You are a flight assistant. 
 USER: Hi. I am David Thomas.

ASSISTANT: Hello, how may I help you?

USER: Can you please cancel my existing reservation as my scheduled holiday trip got cancelled due to bad weather?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: It's ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for availing us.