You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my existing reservation, which is done recently. Can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Helen Young.

ASSISTANT: On what dates do you planed your journey?

USER: My planned journey dates are Nov 30 and Dec 02.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a flight with connection limit-1.

ASSISTANT: Do you have any other preferences?

USER: No, I din't have any other specifications.

ASSISTANT: Can you share your source and destination of your trip?

USER: My source code is PHL and destination code is SFO.

ASSISTANT: There is a flight with number 1012 with single connection, with price 100 is available. Is it ok for you?

USER: That's fine for me, please proceed with that ticket booking.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help in booking my ticket for the flight-1012.

ASSISTANT: Thank you for reaching us.