You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Nicholas Walker here.

ASSISTANT: How may I help you out?

USER: Can you please help me out in booking the ticket from Atlanta to Oakland? As I'm planning to go for trekking at Oakland hills.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Sure, I want to depart from here on 12/03 and I want to return-back by 12/05.

ASSISTANT: Can I know your airport codes too?

USER: My source airport code is ATL and my destination airport code is OAK.

ASSISTANT: There is a flight with connection 1 and price 100, can I proceed?

USER: That's fine for me, please proceed for booking.

ASSISTANT: Ok, your ticket has been booked with flight number 1009.

USER: Thank you so much for your help.

ASSISTANT: Thank you for your services.