You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: Due to some health issue, I am unable to travel now.So,can you please cancel my reservation?

ASSISTANT: Sure. May I know your good name?

USER: I am Patrick Roberts.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found on your data.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you.