You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, Please notify me, how can I best serve you today?

USER: Due to my health problem I want to cancel my reservation, could you please help me that?

ASSISTANT: Sure, I can help you in that cancellation.

USER: Thanks for aiding me.

ASSISTANT: May I know your good name to track the details, Can you please provide me?

USER: Sure, my name is Daniel Perez.

ASSISTANT: Ok, just give me a moment please.

USER: Ok, I will wait for your information.

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

USER: Ok, no problem that. Thank you.

ASSISTANT: Thanks for contacting us, have a great day.