You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Young here.

ASSISTANT: Dorothy Young, how may I assist you today?

USER: I want to reserve my ticket from OAK to CLT, can you please help me to book a ticket?

ASSISTANT: Yes, I will help you. Please let me know with your trip dates.

USER: Sure, my planned dates of journey are from Jan, 20 to Jan, 22.

ASSISTANT: May I know if you need a direct or connecting flight please?

USER: Yes, I need a connecting flight.

ASSISTANT: Please let me know if you have any other preferences with respect to your journey.

USER: Yes, I need a return time which is at evening.

ASSISTANT: We have a connecting flight operated by Frontier Airlines with a fare of 200 that returns in the evening from Charlotte. Shall I book the ticket ?

USER: Ok, you can book it.

ASSISTANT: I have booked your ticket in flight-1004. It departsfrom OAK 0:00AM Jan, 20 and return form CLT  at 2:00AM Jan, 22.

USER: Thank you for your help in booking my ticket.

ASSISTANT: Thank you for reaching us. Have a happy journey.