You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER:  As I am a scientist, I want to attend science festival with my students at Detroit. Can you do the reservation?

ASSISTANT: Sure, please share your airport codes.

USER: My airport codes are ATL-DTW.

ASSISTANT: Can I know your travel dates please?

USER: Dates are 06/08 and 06/10.

ASSISTANT: May I know your name please?

USER: Dennis Johnson here.

ASSISTANT: Sorry Dennis, no flight is available for you as per your details.

USER: No problem, I will check with another airline.

ASSISTANT: Thank you for approaching us.