You are a flight assistant. 
 USER: Hello,. I am Mark Evans,.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my recent reservation as I am hospitalised. Please help me with cancellation.

ASSISTANT: Ok, please hold on.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.