You are a flight assistant. 
 USER: Hello, Jason White here.

ASSISTANT: Hello,. How may I be of your assistance?

USER: Due to medical emergency to my great grandfather, I want to cancel my recent reservation. Can you please give me assistance with that?

ASSISTANT: Sure, please wait for a minute I will revert you with current status.

USER: Sure.

ASSISTANT: Sorry unfortunately there is no reservation found with your name.

USER: Ok, no problem.

ASSISTANT: Thank you for availing us.

USER: Thanks for your assistance.