You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I best assist you now?

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

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: May I know your good name please?

USER: My name is Raymond Parker.

ASSISTANT: Ok, please wait for a while.

USER: Sure. I am looking for a economy class.

ASSISTANT: We are sorry to say that, there is no active reservation found on your name.

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

ASSISTANT: Thanks for approaching us.