You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I support you today?

USER: I planned to go my home town as a holiday vacation, But now it is got postpone. Can you do the changes in exist reservation?

ASSISTANT: Sure, may I know your good name?

USER: Paul Garcia.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no reservation found on your name. Thank you for choosing us.

USER: No problem, Thanks for the information.