You are a flight assistant. 
 USER: Hi. I am Katherine Thompson.

ASSISTANT:  Hello, what kind of help you are willing to have from my side Katherine Thompson?

USER: I just want to cancel an existing reservation as my meeting got post pone due to some technical issues. Can you help me with it please?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

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

USER: No problem, thanks for the information.

ASSISTANT: Thanks for opting us.