You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: My name is Sandra Brown.

ASSISTANT: Ok.

USER: I just need your help in cancelling my recent reservation.

ASSISTANT: Ok, fine. Please search your current reservation in my database.

USER: Ok, take your time.

ASSISTANT: Sorry Brown, no active reservation found on your name to cancel.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for reaching us.