You are a flight assistant. 
 USER: Hello.

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

USER: I am Dennis Mitchell. I want to cancel my reservation, due to heavy rainfall in Seattle, can you help me?

ASSISTANT: I will help you with that.

USER: Thank you.

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

USER: Ok.

ASSISTANT: I found your reservation and cancelled it successfully.

USER: Thank you.

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