You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Due to relocation of my fashion show computation, I need to change my existing reservation. Will you please help me in changing?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Christopher Taylor from San Francisco.

ASSISTANT: Please wait for a minute, I will check the status of your reservation and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on the name of Christopher Taylor in the database.

USER: No worries, thanks for your support.

ASSISTANT: Thank you for choosing us.