You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I aid you?

USER: I am planning to visit to science exhibition at Phoenix AZ-PHX.

ASSISTANT: Ok, may I know your trip dates?

USER: My trip dates are from 05/28 and 05/30.

ASSISTANT: Where do you want to board?

USER: My  boarding point is Denver CO-DEN.

ASSISTANT: Ok, may I know your price limit?

USER: I can afford up to 200.

ASSISTANT: May I know your name?

USER: I am Scott Anderson.

ASSISTANT: There is a flight on Frontier airline, flight number 1003 it cost only 100.

USER: Ok, proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thanks  for your information.

ASSISTANT: Thank you.