You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Robert Campbell. I want to change my reservation due to heavy rainfall at my place.

ASSISTANT: Sure, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation found in your name.

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for opting us.