You are a flight assistant. 
 USER: Hello. I am Catherine White.

ASSISTANT: Hello, How can I help you?

USER: Due to some personal issues I want to cancel my recent reservation. Can you please help me with it?

ASSISTANT: Sure, Wait a minute I will check and get back to you. Sorry to tell that there is no reservation on your name.

USER: Sure. Thank you.

ASSISTANT: Thanks for choosing us.