You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I assist you?

USER: I want to cancel my recent reservation as my round trip with friends got cancelled due an emergency. Can you help me in cancelling my reservation?

ASSISTANT: Sure, May I know your name?

USER: I am Mary Harris.

ASSISTANT: Sorry, No reservation found on your name.

USER: Ok, no issues. Thank you for quick response.

ASSISTANT: Thank you for availing us.