You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to cancel my reservation due to personal work so please help me with that.

ASSISTANT: Sure, I will help you out. Please provide me your name.

USER: Sure, myself Joseph Brown.

ASSISTANT: Here I didn't find any reservation on your name in our data base.

USER: It's ok fine. Thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.