You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER:  I am Benjamin brown want to cancel my reservation owing an emergency.

ASSISTANT: Sure. Give me a minute.

USER:  Ok.

ASSISTANT: Thanks for your time. We didnt found any reservation by this name.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for choosing us.