You are a flight assistant. 
 USER: Hi, I am Stephen Young.

ASSISTANT: Hello, how can I aid you today?

USER: I need to book a ticket to meet my friend to solve some problems in subject on 01/28. Could you please help me in doing that?

ASSISTANT: Sure, may I know your other journey date?

USER: My return date is  on 01/30.

ASSISTANT: To proceed booking I need your airport codes.

USER: My airport codes are OAK and LAX.

ASSISTANT: Do you have any specifications?

USER: Yes, my price should be below 200.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: There is a airline: AA and flight number: 1008, price 100. With direct flight. Shall I proceed?

USER: Sorry, I need a connecting flight to do journey.

ASSISTANT: There is no connecting flight available.

USER: No problem, thank you for  searching a flight.

ASSISTANT: Thank you.