You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Brian Campbell. I have to attend a Live Concert at PHL, could you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you out. May I know your departure airport code please?

USER: My nearest source airport code is IAD and destination airport code is PHL.

ASSISTANT: Can I know your travelling dates please?

USER: I would like to take off on 07/19 and return on 07/21.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight with connection 1, can I proceed with this flight?

USER: Please proceed with the booking if the ticket fare is less than 500.

ASSISTANT: Ok, your ticket has been booked. Thank you for reaching us.

USER: Thank you for your service.