You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Alexander Anderson here.

ASSISTANT: How can I help you?

USER: I have planned to visit a meeting, but it is postponed now, so could you please help me to cancel my reservation?

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

USER: Ok, thank you for the information.

ASSISTANT: Welcome, have a nice day.