You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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

ASSISTANT: Sure, please mention your journey dates.

USER: Dates are 05/06 and 05/08.

ASSISTANT: May I know from where you are flying from and landing at?

USER: My airport codes are DEN-LGA.

ASSISTANT: Ok, I need your name for documentation purpose.

USER: Pamela Walker here.

ASSISTANT: There is no flight with your respective dates of travel.

USER: No problem, Thank you.

ASSISTANT: Thank you for choosing us.