You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I'm planning to participate in trekking at Oakland hills, can you please book the ticket from LGA to OAK?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: Sure, I would like to depart from my source location on 25th Dec and I want to return back by 27th Dec.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I prefer single connected flight.

ASSISTANT: May I know your good name please?

USER: My name is Barbara Roberts.

ASSISTANT: Do you have any other specifications?

USER: I want to depart in the afternoon time only.

ASSISTANT: We found Southwest airline with economy class and flight number is 1002 with arrival time is 4:00 hours and depart time is 16:00 hours.Shall I proceed for booking?

USER: That's perfect! You can proceed for booking the ticket.

ASSISTANT: Your ticket is booked.

USER: Thank you so much for your help.

ASSISTANT: You are welcome.