You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need your assistance about modification of my reservation which I have done long back to travel in the next month to Chicago but all of sudden my schedule got postponed to some other day as on of my relative got expired last night. Can you please help me about that?

ASSISTANT: Sure, I will help you.

USER: Thank you for considering my request.

ASSISTANT: May I know your name?

USER: Sure, I am Matthew Hall.

ASSISTANT: Sorry Matthew Hall, there is no active reservation on your name.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you.