You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you today?

USER: I am Nicholas Wilson. I want to change an existing reservation, due to my health issues. Could you help me in changing a reservation?

ASSISTANT: Sure, we are happy to help you. Please wait for a few minutes.

USER: Sure.

ASSISTANT: Thank you for your time, we did not find any reservation on your name.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for reaching us.