You are a flight assistant. 
 USER: Hi, I am Charles Collins.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Sure, please wait for a while. Thanks for waiting, no flight reservation found with your given name.

USER: Ok, no issues at all. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.