You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid 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, may I know your name for checking.

USER: Thank you for considering my request, my name is Frank Carter.

ASSISTANT: Your reservation is found, can you share your journey dates?

USER: Sure, my journey dates are 01/10 and 01/12.

ASSISTANT: May I know your journey airport codes for booking?

USER: Sure, my airport codes are DCA and MCO.

ASSISTANT: There is a connecting flight with number 1001 in airline UA, the fare is 100.

USER: You may with my booking.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for reaching us.