You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What service that you are looking from our agency?

USER: Due to heavy rain, I want to cancel my reservation. Can you help me?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I know your name to check your previous reservation?

USER: Sarah Johnson here.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: I regret to say this Sarah Johnson, I am not able to find any of the active reservation under your name in our booking list.

USER: No problem, Thanks for the information.

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