You are a flight assistant. 
 USER: Hello, I am Dennis Jackson.

ASSISTANT: Hello, how can I assist you?

USER: Due to sudden rainfall at my destination, I want to cancel my reservation. Can you help me with this?

ASSISTANT: Sure, I am here to help you. Please stand by.

USER: Sure.

ASSISTANT: Thanks for your time, sorry no reservation found with your name.

USER: Ok, Thank you for your service.

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