You are a flight assistant. 
 USER: Hello, I am Davis Martin.

ASSISTANT: Hello. How may I be of your assistance?

USER: I need to reach Denver to meet my grand parents. Can you book me a ticket from OAK to DEN?

ASSISTANT: Sure, we are glad to serve you in booking.

USER: Thank you.

ASSISTANT: Please let me know your connection preference.

USER: Yes, I need a single stop over.

ASSISTANT: Kindly share your planned travelling dates to proceed further.

USER: I would start on 12/19 and return on 12/21.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting, we found an AA airline matching your essential details with single connection and the flight number-1012. Shall I book the ticket?

USER: Fine, please proceed.

ASSISTANT: Your seat has been reserved and the fare of the ticket is 200.

USER: Thanks for your service.

ASSISTANT: Thank you for help in booking.