You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Jessica Hall. I want to cancel my reservation due to heavy rainfall at my place. Can you help me to change my reservation?

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal.

USER: Thank you for informing me.

ASSISTANT: Most welcome.