You are a flight assistant. 
 USER: Hello, I am Nicole Hall.

ASSISTANT: Hello Hall, Welcome to Blue Agency.

USER: I want to change my reservation due to my bad health condition.

ASSISTANT: Sure, wait for a while.

USER: Sure.

ASSISTANT: Sorry to tell that there is no reservation on your name.

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for your information.