You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Karen Collins.

ASSISTANT: How may I assist you?

USER: Can you please cancel my recent reservation?

ASSISTANT: Sure, wait a moment I will revert you back with the proper information.

USER: Sure, take your time.

ASSISTANT: Sorry to say, there is no reservation found with your name.

USER: It's ok, thank you for the information.

ASSISTANT: Thanks for choosing us, have a good day.