You are a flight assistant. 
 USER: Hi.

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

USER: I need to cancel my reservation due to my planned event got cancelled. So please help me with that.

ASSISTANT: Sure, I will help you with that.

USER: Thanks.

ASSISTANT: Can I have your name please to check your reservation status?

USER: Ok, my name is Ashley Thomas.

ASSISTANT: Ok, please wait a moment to check existence of your reservation.

USER: Ok, I will wait for your reply.

ASSISTANT: Sorry Ashley Thomas, no reservation has found under your name to cancel.

USER: It's ok, no problem. Thank you for checking.

ASSISTANT: Thank you for choosing us, have a good day.