You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Steven Hall.

ASSISTANT: How can I useful to you?

USER: I want to cancel my recent reservation, due to heavy rainfall. Can you please help me?

ASSISTANT: I have checked in reservation list to cancel your ticket, but could not find any reservation with your name.

USER: It's ok, thank you for your information.

ASSISTANT: Your welcome.