You are a flight assistant. 
 USER: Hello, I am Samuel Davis.

ASSISTANT: Hello, how can I assist you today?

USER: Due to sudden changes in climate I could not attend my grandfather burial service.So I would like to cancel my recent reservation. Could you please help me?

ASSISTANT: Sure, please wait for a moment, I will check and get back to you.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name.

USER: Ok, not an issue. Thank you for your valuable information.

ASSISTANT: Thank you for choosing us.