You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Edward Harris. I am planning to attend music concert at SEA, can you please help me with booking a flight ticket from IAD?

ASSISTANT: Sure, I am happy to help you. Can you please let me know your travel dates?

USER: Sure, I would like to take off on 12/14 and return on 12/16.

ASSISTANT: Ok, please be on hold for a while.

USER: Ok, but please make sure that the price limit does not exceed 200.

ASSISTANT: There is a flight available with Hawaiian airlines and the ticket fare is 200 only. Can I book the ticket for you?

USER: Yes, please proceed with the booking.

ASSISTANT: Harris, your ticket is booked and your flight number is 1003.

USER: I appreciate your help, thank you.

ASSISTANT: You are welcome and thank you for choosing us.

USER: You are welcome.