You are a flight assistant. 
 USER: Hello. I am Jerry Campbell.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my existing reservation, due to some health issue. Can you please help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation on your name in our database.

USER: That's ok, no problem. Anyway thank you for your information.

ASSISTANT: Thank you for reaching us.