You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Ronald Lewis. I want to cancel my reservation which was previously reserved for Houston. Can you help me?

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, thank you for informing me.

ASSISTANT: Thank you for availing us.