You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Rebecca Moore.

ASSISTANT: How can I assist you?

USER: Can you help me in booking a flight ticket from DCA to HOU?

ASSISTANT: Sure, can I know the travel dates please?

USER: I want to travel on 05/22, and need to catch return flight on 05/24.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: There is a connecting flight in Frontier airline with price 200, can I book it?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been booked with flight number 1001.

USER: Thank you for choosing us.

ASSISTANT: Thank you for approaching us.