You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Jacob Garcia, I book a ticket to attend the reunion party but the plan is postponed. Help me to change my reservation.

ASSISTANT: Sure, please wait a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: Thank you for the information.

ASSISTANT: Thank you choosing us, have a good day.