You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Helen Moore.

ASSISTANT: What kind of service that you are looking for?

USER: I want to visit my brother for his birthday and come back.

ASSISTANT: Ok, would you please let me know the departure and arrival dates?

USER: Ok, I would like to depart on 07/31 and return back on 08/02.

ASSISTANT: Ok Helen, could you please tell me from where you are planning to start your trip?

USER: I would like to travel from my hometown which is New York LGA.

ASSISTANT: Ok, can you please let me know your destination airport code?

USER: As it is a round trip, my destination is the same as the source which is LGA.

ASSISTANT: Ok Helen, please give me a minute so that I can search for a flight which matches with your requirements.

USER: Sure, take your time.

ASSISTANT: I'm happy to inform you that there is a flight available with one of the best airlines and the price with this flight is 100, may I confirm you ticket with Hawaiian airlines?

USER: Please proceed with the booking.

ASSISTANT: Ok Helen, your reservation is confirmed with the flight 1005.

USER: Thank for helping me out in booking the ticket.

ASSISTANT: Thank you, hope you enjoy your trip.