You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Mark Smith.

ASSISTANT: Hello Mark.

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

ASSISTANT: So sad to here, please give me a moment.

USER: Ok.

ASSISTANT: I found your reservation, I will cancel your reservation.

USER: Thank you for helping me.

ASSISTANT: Get well soon, is there anything else I may do or you?

USER: No.

ASSISTANT: Thank you for approaching us.