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 Philadelphia. Can you do the reservation?

ASSISTANT: Sure, can you share your trip dates?

USER: My journey dates are 03/09 and 03/11.

ASSISTANT: May I know your journey airport codes?

USER: My airport codes are DEN-PHL.

ASSISTANT: Do you have any preferences?

USER: I need break in my journey.

ASSISTANT: Do you have any other requirements?

USER: Departure time is evening.

ASSISTANT: There is a connecting flight with number 1016 in airline UA, the fare is 200.

USER: Please do the booking.

ASSISTANT: Your ticket is booked, the depart time is 2:00 AM and return time is 18:00 PM.

USER: Thank you.

ASSISTANT: May I know your name?

USER: Andrew Nelson here.

ASSISTANT: Thank you for reaching us.