You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me to cancel my recent reservation because my trip dates are got postponed?

ASSISTANT: Sure, I am here to help you. Could you provide your name?

USER: I am Carol Robinson.

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

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.