You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, may I know your travel dates?

USER: Dates are 03/06 and 03/08.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are ATL-SFO.

ASSISTANT: May I know your name please?

USER: I am Larry Hill.

ASSISTANT: Larry Hill, unfortunately there is no flight on your details.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you so much.