When a flight attendant stopped Dr. Tamika Cross, OBGYN, from helping an unconscious passenger, she was confused — because she’s a doctor.

“We are looking for actual physicians or nurses or some type of medical personnel,” the young black OBGYN resident says the attendant told her. “We don’t have time to talk to you.”

Cross, who works at Lyndon B. Johnson Hospital in Houston, said the incident was an “unfortunate scenario.” The flight attendant asked for an onboard physician on the flight from Detroit to Minneapolis. She volunteered. But the flight attendant continually questioned whether Cross was really a doctor.

In an interview with TIME, Cross says her now-viral experience reveals the national dilemma of inherent bias America still faces.

“Besides being concerned that the series of events delayed initial medical assessment, the situation is obviously upsetting. We have come so far in this nation but this is a reminder that we still have so much further to go,” she tells TIME.

Delta said in a statement that the company is conducting a full investigation.

“We are troubled by any accusations of discrimination and take them very seriously,” the Delta statement said. The company added, “Three medical professionals identified themselves on the flight in question. Only one was able to produce documentation of medical training and that is the doctor who was asked to assist the customer onboard. In addition, paramedics met the flight to assist the customer further.”

Cross’s account of the incident and Delta’s statement differ.

Cross says that Delta shared the information regarding the credentials with her approximately 24 hours after the company shared the statement on social media, telling TIME: “I personally did not see credentials presented,” adding “I personally did not witness a third physician involved in the care of this patient.”

Cross tells TIME she wants sensitivity training for the employee in question plus a public apology from Delta on the flight attendant’s behalf. While Cross believes this incident was unique to this one flight attendant, she sees the incident as a learning opportunity for everyone.

“I have made it clear to several people that I am not looking to get the involved flight attendant fired. I do think she could benefit from sensitivity training. She may not be aware of her biases but in this case it caused a delay in medical treatment. A public apology from Delta on her behalf would seem fitting in addition to further investigation and ramifications that would prevent this type of event happening again in the future. I want us to learn from this event, hence my sharing it publicly. There are several learning points that can be drawn from this scenario for everyone. This unfortunate scenario has been used as a platform to open an uncomfortable discussion across America. Now that we are all discussing it, let’s work together to implement change.

Delta Airlines did not elaborate on their statement except to tell TIME that “[t]he experience Dr. Cross describes run counter to our culture and we are taking it very seriously.”

Get The Brief. Sign up to receive the top stories you need to know right now. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Ashley Hoffman at Ashley.Hoffman@time.com.