You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I would like to book a ticket from LAX to PHL, can you please help me out?

ASSISTANT: Sure, I will help you. Can you please tell me your journey dates?

USER: I am travelling on these dates Oct 18th and 20th.

ASSISTANT: Ok please tell me your preference if any.

USER: I prefer departure in the evening.

ASSISTANT: May I know your name?

USER: Gary Lopez here.

ASSISTANT: There is a flight which departs in the evening and returns in the afternoon, can I reserve the ticket with this flight?

USER: Ok, you can proceed.

ASSISTANT: I have booked your ticket with the flight-1004 and the airlines is Delta.

USER: Thank you for your services.

ASSISTANT: Thank you for choosing us.