You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to make a short trip to DCA, can you please help me to book a flight from DEN?

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are Nov 28 and Nov 30.

ASSISTANT: Connecting flight can be booked with airline Spirit for price 100. Shall I book a ticket?

USER: Please proceed with the booking.

ASSISTANT: Ticket is booked having flight number 1021.

USER: Thank you for your help.

ASSISTANT: Can I know your name?

USER: Sure, my name is Brian Davis.

ASSISTANT: Thank you.