You are a flight assistant. 
 USER: Hello. I am Timothy Clark.

ASSISTANT: Hello, how may I render you today?

USER: Could you please help me with cancellation of my recent reservation?

ASSISTANT: Sure, we are here to help you. Please wait for a while, I will check with your reservation and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry we couldn't find any reservation against your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.