You are a flight assistant. 
 USER: Hello, I am Donna Johnson.

ASSISTANT: Hello. How can I help you?

USER: Can you aid me in booking a flight ticket from LAS to PHL?

ASSISTANT: May I know your travelling dates?

USER: Sure, I would like to go on May 31st and return back on June 02nd.

ASSISTANT: Do you have any class preferences?

USER: Any class is fine for me.

ASSISTANT: Do you want any connections?

USER: Ensure it is a single connecting flight.

ASSISTANT: Can you help me with your arrival and departure timings?

USER: Ensure the return time is in the evening.

ASSISTANT: Southwest airlines flight number 1019 with price 200 and a connection limit of one with economy class is available. Do you want me to proceed with that?

USER: Ok, please proceed for further.

ASSISTANT: Your ticket has been booked. The departure time is 18:00PM and arrival time is 0:00AM.

USER: Thank you for booking.

ASSISTANT: Welcome. Have a safe trip.