You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my recent reservation due to sudden change in my trip. Can you please check the reservation by this name  Kevin Harris?

ASSISTANT: Sure, just a moment I will check and let you know.

USER: OK.

ASSISTANT: Thanks for waiting, we didn't found any reservation by this name.

USER: Ok, Thank you for your help.

ASSISTANT: Thanks for picking us, have a nice day.