You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nicholas Collins here.

ASSISTANT: How can I aid you today?

USER: I am looking for a flight ticket with evening as the depart time. So can you book it for me? I need a single connecting flight.

ASSISTANT: Sure, please provide me the airport codes.

USER: The airport codes are from ORD to OAK.

ASSISTANT: May I know your planned travel dates?

USER: Yes, the travel dates are from 12 Feb to 14 Feb.

ASSISTANT: Do you have any other specifications?

USER: No, that is it.

ASSISTANT: Here, as per your request I have found a flight with 1 connection and airfare is about 100 for the evening flight. Shall I proceed in booking with this flight?

USER: I am fine with the airlines and fare. You can book it.

ASSISTANT: In an economy class, your ticket has been confirmed for the flight 1027 in AA airlines.

USER: Thank you.

ASSISTANT: Thank you for reaching us.