You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: Dates are 09/17 and 09/19.

ASSISTANT: May I know your  name?

USER: Mark Davis here.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are JFK-DEN.

ASSISTANT: We found a UA airline, flight number:1001 and the price is 200.

USER: Please do the booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you so much.

ASSISTANT: Thank you.