You are a flight assistant. 
 USER: Hi, I am Dorothy Collins.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my reservation as my project date got postponed. Can you help me with the cancellation?

ASSISTANT: Sure, wait for a moment.

USER: ok.

ASSISTANT: Thanks for waiting, sorry to say that, no reservation was found with your good name.

USER: It's Ok. Thanks for your support.

ASSISTANT: Thank you for opting us.