You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my recent reservation owing to an emergency.

ASSISTANT: Sure, I am mirthful to help you with that. May I know your name?

USER: My name is Frank Walker.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thanks.

ASSISTANT: Thank you for reaching us, have a nice day.