You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to sudden demise of my Great grandfather, I want to cancel my recent reservation.

ASSISTANT: Sure, can you please provide me your name?

USER: I am Margaret Davis.

ASSISTANT: Sorry, there is no reservation with your given name.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.