You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please help me out?

ASSISTANT: Sure, I am here to help you out.

USER: My name is Benjamin Davis. Thank you.

ASSISTANT: May I know your name please? We haven't found nay reservation under your name in our database.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for reaching us.