You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am planning to visit Washington, will you help me in booking the flight ticket from IAD to DCA?

ASSISTANT: Sure, may I know your name?

USER: Myself Rachel Roberts.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are July 23 and July 25.

ASSISTANT: Do you have any requirements?

USER: I need a flight with single connection.

ASSISTANT: Let me know your requirements?

USER: I don't have any other specifications.

ASSISTANT: There is a economy class flight 1011 of Southwest airlines, can I proceed?

USER: Sure, you can proceed with the booking.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Welcome.