You are a flight assistant. 
 USER: Hello,. I am John Evans.

ASSISTANT: Hello, how may I oblige you today?

USER: Due to earthquakes disaster happened in the place where I wanted to visit.So I would like to cancel my recent reservation. Will you please help me with cancellation?

ASSISTANT: Sure, we are glad to serve you. Please hold a moment, let me check with the existing reservation in our database and let you know.

USER: Sure.

ASSISTANT: Thanks for your valuable time, sorry, unfortunately no recent reservation found with provided name.

USER: Ok, no worries at all. Thank you for your kind service.

ASSISTANT: Thank you for opting us, have a great day ahead.