You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I need to change my existing reservation as my exams got postponed, Can you please help me with that?

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please provide your name to check your reservation status.

USER: Eric Wilson here.

ASSISTANT: Please hold on a moment, I will revert you.

USER: Sure.

ASSISTANT: Eric Wilson, there is no active reservation on your name in our database.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for approaching us.