You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER:  I need to cancel my recent existing reservation due to postpone of Hockey finals. Can you cancel my reservation?

ASSISTANT: Sure, can I have your name please?

USER: I am Alexander Adams.

ASSISTANT: Ok, please wait for a moment I will let you know.

USER: Ok.

ASSISTANT: Thanks for waiting, we have not found any reservation with your given name.

USER: Ok, no problem. Thank you for your response.

ASSISTANT: Thank you for approaching us.