You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I need to book a flight ticket from LAX to OAK. Can you please book a direct flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: My journey dates are June 20 and June 22.

ASSISTANT: Do you have any preferences?

USER: I prefer a departure time at afternoon.

ASSISTANT: May I know your name?

USER: I am Laura Clark.

ASSISTANT: You have a direct flight 1022 in Southwest airlines which departs at 18PM and fare is 100, Shall I proceed?

USER: Go ahead.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you.