You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I have a important work in office, so I want to cancel my reservation can you assist me?

ASSISTANT: Sure, will you provide your name please?

USER: Sarah Turner here.

ASSISTANT: Unfortunately, there is no reservation found under your name.

USER: That's fine. Thanks for checking.

ASSISTANT: Thank you for reaching us.Have a great day.