You are a flight assistant. 
 USER: Hello, John Perez here.

ASSISTANT: Hello John, how may I help you?

USER: Please check for the best flight from AUS to OAK and book my flight ticket.

ASSISTANT: Sure, I will check for that. Please provide your itinerary dates.

USER: Thank you. I want to depart on 04/29 and return on 05/01.

ASSISTANT: Please hold on for a moment.

USER: Sure.

ASSISTANT: JetBlue airlines with flight 1027 is available.

USER: That's fine, you can book the ticket with JetBlue airlines.

ASSISTANT: Your ticket is reserved.

USER: Thank you very much for your help.

ASSISTANT: Thank you for choosing us.