You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you at this moment?

USER: My name is Christopher Gonzalez. I want to change my reservation as there is heavy rain forecast, can you please help?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Sure.

ASSISTANT: There is no previous reservation available under your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.