You are a flight assistant. 
 USER: Hi, my name is Jonathan Thompson.

ASSISTANT: Hello. How can I serve you?

USER: Due to the sudden change in climate, my meeting with client has been cancelled. So I had a request to you to cancel my existing reservation?

ASSISTANT: Sure, I can help you. Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: Ok, no worries at all.

ASSISTANT: Thank you.

USER: Thanks for your assistance.