You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: I want to cancel my reservation which is done recently due to some health issues, can you please help me?

ASSISTANT: Sure, may I know your name to check the list and revert you.

USER: Sure, my name is Charles Clark.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation active by your name in our data base.

USER: Ok, no problem.

ASSISTANT: Thank you for picking us.

USER: Thank you for your service.