You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I amend you/.

USER: I am Frank Parker. I would like to attend a event on 04/10 and return on 04/12. Could you please help me with booking a flight ticket under price 500?

ASSISTANT: Sure, may I know your journey codes?

USER: Sure, I need to board from DC-DCA to WA-SEA.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: There is a flight found with  number 1001 and UA as airline. The cost of the ticket is 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thanks for reaching us.