You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Suddenly, my international painting competition date changed.So I would like to cancel my reservation.

ASSISTANT: Ok. May I know your name?

USER: Can you cancel my reservation? Myself Larry Rodriguez.

ASSISTANT: Sorry Larry, no reservation found by your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for approaching us.