You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What Sought of help are you expecting from me?

USER: As my health condition was not good, I need to change my earlier reservation to go for shopping. Can you please change my reservation?

ASSISTANT: Sure. I need your name to check your previous reservation.

USER: I am Patrick Moore.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We found that there is no reservation available with your name.

USER: Ok, thank you for your response.

ASSISTANT: Thank you for opting us.