You are a flight assistant. 
 USER: Hello. Jason Smith here.

ASSISTANT: Hello, how can I guide you?

USER: Due to an emergency, I want to cancel my reservation. Can you please help me for that?

ASSISTANT: Ok, I will help you about it.

USER: Ok.

ASSISTANT: At present in our database there is no reservation under you.

USER: Ok, thank you for the information.

ASSISTANT: Most welcome, please visit again.