You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Is this flight ticket booking agency?

ASSISTANT: Yes, this is flight booking agency. In what way we can help you today?

USER: I want to visit Griffith Observatory it is in Los Angeles, can you please check is there any flight ticket available from New York on 05/31?

ASSISTANT: Sure, can you please provide your source and destination airport codes?

USER: Sure, I would like to take off from EWR airport and destination airport is LAX.

ASSISTANT: Ok, when would you like to return back from Los Angeles?

USER: Yes, please book my return ticket also, I would like to return Los Angeles on 06/02.

ASSISTANT: Ok, hold on for a moment please. Let me check the best flight for you.

USER: Sure.

ASSISTANT: We are glad to inform you that, there is a flight with UA airline and it costs you 100. Shall I proceed to reserve this ticket?

USER: That's great, please book this flight ticket.

ASSISTANT: Your ticket has been booked with 1001 flight number.

USER: Thank you for your help.

ASSISTANT: Thank you choosing us. May I know your name please?

USER: Sure, myself Linda Baker.

ASSISTANT: Have a safe flight Linda.