You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you now?

USER: I want to cancel my recent reservation due to an emergency issue.

ASSISTANT: Sure, please provide your good name to cancel a reservation?

USER: Benjamin Brown is my name.

ASSISTANT: Sorry, we do not found any reservation under your name.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.