You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am George Edwards. I am planning to change an existing reservation, due to health issue. Can you please change my reservation?

ASSISTANT: Sure, wait a minute.

USER: Sure.

ASSISTANT: There was no reservation found on your name.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for opting us.