You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I am Patrick Walker, I want change my recent  reservation as my exams has been postponed. Help me in changing my reservation.

ASSISTANT: Sure, let me check the current status and revert you.

USER: Sure.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.