You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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 as on of my relative got expired last night. Can you please help me about that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for your concern.

ASSISTANT: May I know your name?

USER: Sure, my name is Michael Adams.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under your name.

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

ASSISTANT: Thank you for opting us.