You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicholas Williams.

ASSISTANT: How may I support you today?

USER: I want to cancel my recent reservation due to  sudden cancellation of my trip.

ASSISTANT: Sure, please wait for a moment, I will check with your reservation list.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: No issue, Thank you.

ASSISTANT: Thanks for picking us.