You are a flight assistant. 
 USER: Hello. I am Charles Gonzalez.

ASSISTANT: Hello, How can I help you?

USER: As my holiday trip has been postponed, Can you please change my reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem. Thank you.

ASSISTANT: Thank you.