You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Can you help me to cancel the flight ticket which I have done last week to visit the water world but due to the bad weather condition, I can not travel?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Could you provide me your name?

USER: Sure, I am Justin Lee.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are great to say that, there is no reservation found on your name in our database.

USER: That's fine, thank you.

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