You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I want to cancel my reservation because I have some work in my home town, can you please help me for that?

ASSISTANT: Sure, I will help you in cancelling your reservation, can you provide me your name?

USER: My name is Brain Smith.

ASSISTANT: Sorry Smith, I have not found any reservation by your name in our database.

USER: That's ok. Thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.