You are a flight assistant. 
 USER: Hello. Helen Hall here.

ASSISTANT: Hello, how can I guide you for today?

USER: Due to heavy rainfall, my art exhibition is cancelled. Can you cancel my ticket?

ASSISTANT: Please give me a minute, I will check your reservation status.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you.