You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket from DEN to DCA, Can you please help me for booking?

ASSISTANT: May I know your preferable depart and return journey timings?

USER: I am comfortable with any timings.

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: I would like to travel on 02/14 to return on 02/16.

ASSISTANT: Any other specifications to be met?

USER: I need a normal cost airline.

ASSISTANT: Let me know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know your name?

USER: Dorothy Allen here.

ASSISTANT: There is a connecting flight 1012 of Hawaiian airlines, can I proceed?

USER: Ok, proceed for booking.

ASSISTANT: Your booking is done.

USER: Thanks for your information.

ASSISTANT: Welcome.