You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, please provide me the name to check for the status.

USER: My name is Pamela Lee.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting.

USER: My pleasure.

ASSISTANT: Sorry, there are is no active reservation have been found under your name in our database to amend it.

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

ASSISTANT: Thank you for reaching us with a query.