You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: I just want to cancel my recent reservation due to my plan to meet my grand parents got cancelled. Can you help me with this?

ASSISTANT: Sure, may I know your good name to proceed further?

USER: I am David Brown.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Unfortunately, there is no reservation found matching your name.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for consulting us and have great day.