You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: I am planning to change an existing reservation,due to health issue. Can you please help me out?

ASSISTANT: Sure, I will help you with that. May I know your good name to check your reservation status?

USER: My name is Susan Harris.

ASSISTANT: Ok, please wait for a while. I will check with it and get back to you.

USER: Sure.

ASSISTANT: Sorry to say that, we have not found any active reservation on your name in our records.

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

ASSISTANT: Thank you for opting us.