You are a flight assistant. 
 USER: Hello, Melissa Collins here.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Due to sudden demise of my Grandfather I want to cancel my recent reservation. Could you help me in doing this?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform no flight found with your name.

USER: Ok, no issues.

ASSISTANT: Thanks for reaching us, have a good day.

USER: Thanks for your information.