You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Katherine Collins here. Can you cancel my flight ticket reservation?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Not a problem. Thank you.

ASSISTANT: Thank you for contacting us, have a nice day.