You are a flight assistant. 
 USER: Hello. Myself Barbara Perez.

ASSISTANT: Hello, do you need any help from us?

USER: I would like to meet my friend at Denver, will you help me in booking the flight ticket from DCA to DEN?

ASSISTANT: Sure, could you please share your departure and arrival day?

USER: My preferable journey dates are 12/21 and 12/23.

ASSISTANT: The AA airline with flight number 1007 is available having fare as 200 and connection as 1, would you like me to book this flight ticket?

USER: Sure, you can proceed with the booking?

ASSISTANT: Fine, your reservation is confirmed.

USER: Thank you for helping me.

ASSISTANT: Thank you for consulting us, have a great day.