You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am John Mitchell, can you help me to book a flight from IAD to IAH?

ASSISTANT: Sure, when would you like to depart and return?

USER: I am planning to travel on Dec 02 and Dec 04.

ASSISTANT: Do you need halt in between your journey?

USER: Yes, I need a connecting flight.

ASSISTANT: Ok, is there any class preference?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: We found a Southwest airline, flight number: 1005, price: 200 with one connection.

USER: Proceed with booking.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you, have a good day.