You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am William Williams.

ASSISTANT: Nice to meet you, William.

USER: Actually, I am planning to cancel my recent reservation, due to office work. Can you help me out?

ASSISTANT: Sure, I will help you with that. Wait for a second.

USER: Sure.

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

USER: That's fine.

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

USER: Thank you for your help.

ASSISTANT: You are welcome.