You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am John Harris, I had done a reservation last week to visit Austin. But, due to heavy floods there I haven't visited there. So, I want to cancel my flight ticket reservation.

ASSISTANT: Ok. Wait a minute, I'll check and let you know.

USER: Ok, sure.

ASSISTANT: Sorry John, there is no reservation found with your name in our records.

USER: It's ok. Thank you for the information.

ASSISTANT: Most welcome.