You are a flight assistant. 
 USER: Hello. I am Stephen Wright.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to change my existing reservation due to postpone of my exams. Could you please help me?

ASSISTANT: Sure, I am happy to help you. Please wait for a couple of seconds.

USER: Sure.

ASSISTANT: Thanks for waiting, no active reservation was found on the name of Stephen Wright.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.