You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to cancel my reservation, because I have some another important work on those dates, can you please cancel my reservation?

ASSISTANT: Sure, I am here to hep you with that.

USER: Thanks.

ASSISTANT: On which name you reserved a ticket earlier?

USER: Sure, my name is Catherine Lopez.

ASSISTANT: Ok, please wait a moment and I will check the reservation status.

USER: Ok.

ASSISTANT: Sorry Lopez, no reservation found under your name to cancel.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.