You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I oblige you today?

USER: I am Amy Wilson. Could you help me in booking a flight ticket from Dallas & Fort Worth to Washington on 09/23?

ASSISTANT: Sure, can you please provide your airport codes?

USER: My source and destination airport codes are TX - DFW, DC - DCA.

ASSISTANT: May I know when would you like to return?

USER: I want to return on 09/25.

ASSISTANT: Do you have any other requirements to be met?

USER: I need a economy class flight ticket.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We found a connecting flight for you, flight details are as AA airline, fare 200 and flight number 1016. Shall I reserve your ticket?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you for approaching us.