You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to cancel my recent reservation, as my health is not doing good. Can you please help me with it?

ASSISTANT: Sure, please mention your name to check your reservation details in our database.

USER: My name is Mark Evans.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: Ok, no problem. Anyways, thank you.

ASSISTANT: Thank you for choosing us.