You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Yesterday night my grand father met with an accident, So I want to cancel my recent reservation. Can you help me?

ASSISTANT: Sure, can I have your name to proceed further?

USER: Benjamin King here.

ASSISTANT: Ok, please hold a moment, let me check your reservation with us.

USER: Ok.

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

USER: No problem. Thanks for the valuable information.

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