You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I need to cancel my reservation which I have done to give presentation in WTO but unfortunately it got cancelled. So, can you please help me with cancelling my reservation?

ASSISTANT: Sure, I will help you on that. Could you please provide your name to check your previous reservation status?

USER: Sure, please check reservation with name of Shirley Roberts.

ASSISTANT: Ok, please hold on a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Roberts, we regret that, there is no reservation found under your name in our records.

USER: Oh! May be I did not book properly. Anyway, thank you for your time.

ASSISTANT: Thank you for using our services, have a great day.

USER: Welcome.