You are a flight assistant. 
 USER: Hi, I am  Debra Hall.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my recent reservation because the night was very foggy and through the fog moonlight  gleamed mysterious.Could you please  help me?

ASSISTANT: Sure, wait a moment, let me check your reservation and get back to you.

USER: Ok.

ASSISTANT: Thanks for holding on, sorry, unfortunately no reservation has found with provided name.

USER: Thanks for searching.

ASSISTANT: Pleasure to serve you, have a nice day.