You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Karen Lee.

ASSISTANT: How can I help you today Karen Lee?

USER: I want to cancel my recent reservation, could you please help me?

ASSISTANT: Sure, please wait a moment, I will inform you.

USER: Ok.

ASSISTANT: Sorry Karen Lee no reservation found on your name.

USER: Thank you for the help.

ASSISTANT: Thank you for contacting us.