You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Could you please change my existing reservation.

ASSISTANT: Sure, please provide me your name?

USER: I am Rebecca Garcia.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We found a new reservation, please provide me complete journey details?

USER: Please book a ticket from Austin, TX-AUS to Phoenix, AZ-PHX.

ASSISTANT: Kindly mention me your travelling dates?

USER: My travelling dates are from 09/11 to 09/13.

ASSISTANT: Thanks for your details, we found 1002 JetBlue airline with single connection and price of 200. Shall I proceed with booking?

USER: Please book a ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for reaching us.