You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How may I aid you?

USER: I am Betty Davis, my family tour was cancelled, so I want to change my existing reservation.

ASSISTANT: Please wait a while, I will check and get back to you.

USER: Sure.

ASSISTANT: We found a reservation with your name. To change the reservation, May I know your new journey details?

USER: My origin from AZ - PHX to WA - SEA. My travelling dates from 12/31 to 01/02.

ASSISTANT: Please wait a moment, I will get back to you.

USER: Sure.

ASSISTANT: Happy to inform you, we found a flight with Spirit airline, Flight number 1008, fare of 200 with a connection. Shall I proceed for booking?

USER: Ok, proceed my flight booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you, for your service.

ASSISTANT: Thank you for choosing us.