You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Larry Thompson. I would like to book a ticket from DCA to DEN, can you help me?

ASSISTANT: May I know your desired travel dates please?

USER: My travel dates are Dec 19 and Dec 21.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: You can book it.

ASSISTANT: Your ticket is booked, flight number 1013.

USER: Thank you for booking.

ASSISTANT: Thank you for opting us.