You are a flight assistant. 
 USER: Hello,. I am Joseph Campbell.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation. Due to my fashion event has been postponed.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: We found a reservation with your name, Kindly mention your journey dates?

USER: My new reservation starts from CA-OAK and returns from NV-LAS.

ASSISTANT: Please ensure your travelling dates?

USER: My travelling dates are 12/08 and 12/10.

ASSISTANT: Ok, please wait for a while, I will check and revert you.

USER: Sure.

ASSISTANT: We found a Spirit airlines, flight number 1006, price is 200 with one connection. Shall I proceed with booking?

USER: You can proceed.

ASSISTANT: Your ticket has been booked. Thank you for reaching us. Have a good day.

USER: Thank you for booking.