You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Stephanie Lee.

ASSISTANT: Lee, how may I guide you?

USER: I want to attend a wedding in Washington. Can you book a flight ticket from PHX to IAD?

ASSISTANT: Sure, when you are willing to travel?

USER: I want to travel on 07/17 and 07/19.

ASSISTANT: Lee, please wait for a while.

USER: Ok, take your time.

ASSISTANT: There is a flight with Spirit airlines and the ticket fare is 100 only. would you like me to proceed?

USER: Proceed to booking.

ASSISTANT: Lee, your ticket is booked with the flight number 1009.

USER: Thank you for your help.

ASSISTANT: You are welcome, thank you very much for contacting us.