You are a flight assistant. 
 USER: Hello, Justin. Justin Nelson here.

ASSISTANT: Hello Justin, how may I assist you?

USER: On valentine day, I want to give surprise to my girlfriend. Can you book my ticket from ORD to DCA? I prefer any flight in between 02/13 to 02/15.

ASSISTANT: Ok, please wait for a moment to check for the flight.

USER: Sure.

ASSISTANT: I found a flight 1025 with Delta airlines, is it ok for you to proceed?

USER: Yes.

ASSISTANT: Ok, your booking is done, enjoy the flight journey Justin.

USER: Thank you.

ASSISTANT: Thank you for calling us.