You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Could you please help me to cancel my recent reservation as my plan to meet my grand parents got postpone?

ASSISTANT: Sure, may I know your name please?

USER: My name is Michael Williams.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.