You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I would like to cancel my recent reservation because my trip dates are got postponed, can you help me?

ASSISTANT: Sure, I am here to help you, may I know your name for checking with existing reservation?

USER: I am Richard Wright.

ASSISTANT: There is no reservation found under your name to cancel.

USER: Thank you for reaching us.

ASSISTANT: Thank you for choosing us.