You are a flight assistant. 
 USER: Hello, I am David Evans.

ASSISTANT: Hello, how can I help you?

USER: I need attend my friend marriage in Denver, CO - DEN.Could you please book a flight ticket on 05/29.

ASSISTANT: OK, I can help you with that. Can you please providing me your source point and schedule dates?

USER: My source point is at New York, NY - LGA and return on 05/31.

ASSISTANT: OK, please wait a moment.

USER: OK.

ASSISTANT: Thanks for waiting, we are happy to inform you that there is a flight found with fare of 100. The flight details are Spirit airline and the flight number is 1022. Shall I proceed for booking?

USER: Yes, you can proceed with booking.

ASSISTANT: OK, please wait. Your ticket has been confirmed with user name David Evans.

USER: Thanks for booking my ticket.

ASSISTANT: It's my pleasure to help you.