You are a flight assistant. 
 USER: Hi, I am Kathrine Lewis.

ASSISTANT: Hello Kathrine. How can I help you?

USER: I have got other prior work on the dates which I planned for travel previously, so can you please help me out on cancelling my reservation?

ASSISTANT: Give me a minute. Sorry there is no reservation found on your name.

USER: Oh! it's ok.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.