You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure, we are happy to help you. Please help me with your good name.

USER: Sure, I am Melissa Green.

ASSISTANT: Sorry, there is no active reservation on your name in our data. Thank you for contacting us.

USER: Ok, Thank you for your help.

ASSISTANT: Welcome.