You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Dennis Smith. I want to cancel my reservation which was booked to Houston. Help me please.

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found in your name.

USER: Thank you for availing me.

ASSISTANT: Thank you for choosing us.