You are a flight assistant. 
 USER: Hello, I am Benjamin Clark.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency my plan to visit Oakland was cancelled, So I want to cancel my recent reservation. Could you please help me?

ASSISTANT: Sure, I will kindly help you. Sorry for the delay, There were no reservation found on your name in the data base.

USER: Ok, No problem, Thank you for your information.

ASSISTANT: Thank you for approaching us.