You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to meet my family after a long gap, please book a ticket from BOS to OAK.

ASSISTANT: Sure. Can  I know your travelling dates?

USER: My trip dates are 12/19 and 12/21.

ASSISTANT: May I know your name?

USER: My name is Anthony Carter.

ASSISTANT: We found a Delta airline, flight number:1005 and the price is 400.

USER: Ok, please book my ticket.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you.