You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Jeffrey Green.

ASSISTANT: OK.

USER: I had planned to go on a vacation, but it was cancelled.Can you cancel my  recent reservation?

ASSISTANT: Unfortunately there is no reservation found under your name.

USER: That's fine.

ASSISTANT: Thank you for reaching us.Have a great day.

USER: Thank you for taking time to speak with me.