You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: John Lopez here. I want to travel from SFO to OAK, could you book my ticket?

ASSISTANT: Sure, please provide your trip dates.

USER: My itinerary dates are 11/13 and 11/15.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: Flight 1018 of UA airlines is available for you.

USER: Please book my ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.