You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Harris.

ASSISTANT: How can I help you Harris?

USER: I would like to cancel my reservation as I am leaving for an occasion, can you please help me out?

ASSISTANT: Sure, I am here to help you. Please wait for a moment.

USER: Thank you. Sure, take your time.

ASSISTANT: Sorry Harris, no reservation is available on your name.

USER: Ok no problem, thank you for your services.

ASSISTANT: It's my pleasure, have a nice day.