You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help is required from my end?

USER: I require your help to cancel my reservation, can you help me?

ASSISTANT: Sure, I can help you with that. May I know your name please?

USER: My name is William Collins.

ASSISTANT: Sorry Collins, there is no reservation found on your name.

USER: Ok, no issues, it may be cancelled previously.

ASSISTANT: Ok, thank you for approaching us.

USER: Thank you for your help.

ASSISTANT: Welcome.