You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: My name is Alexander Lewis, I want to book a flight in economy class from Oakland to Washington DC. Can you book a flight in afternoon and return flight in morning?

ASSISTANT: Sure, May I know the travel dates?

USER: I will fly on Aug 11 and return on Aug 13.

ASSISTANT: Please help me with your journey codes.

USER: My source point is OAK and my destination is IAD.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: We have found a direct flight from Southwest airline. Shall I proceed?

USER: Please proceed with booking.

ASSISTANT: Your ticket has been booked with the flight number 1018.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.