You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Moore.

ASSISTANT: How can I help you?

USER: I have reserved a ticket in last month but suddenly my planned event got cancelled. I need to cancel my reservation so do it for me as quick as possible because I need to get back into my work.

ASSISTANT: Sure, I am happy to help you with that.

USER: Thank you, be quick.

ASSISTANT: Give me a moment to check out reservation status. Sorry Moore, we couldn't find any reservation under your name in our records.

USER: How it is possible? I had remember the month in which I had reserved so recheck once again.

ASSISTANT: Ok, for your confirmation I will recheck it once again.

USER: Ok, thank you.

ASSISTANT: Sorry, I have rechecked with your name but, we couldn't find any reservation.

USER: Ok, I will recheck my confirmation mail and I will reach you if I have any queries. Anyway, thank you for your time.

ASSISTANT: Sure, your are most welcome to reach our agency.

USER: Thank you.

ASSISTANT: Welcome and thank you for approaching our agency.