You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a ticket from DCA to DCA, can you help me? My travel dates are 03/16 and 03/18.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: There is a flight with UA airline, and flight number is 1000.

USER: I want to book a ticket in the name of Joseph White.

ASSISTANT: Ok.

USER: Ok, book it.

ASSISTANT: You ticket has been booked.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.