You are a flight assistant. 
 USER: Hi. Jessica Lopez here.

ASSISTANT: Hello. How may I help you?

USER: Reserve a flight ticket for me that is from LAS to OAK.

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

USER: My travelling dates are from 04/03 to 04/05.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: There is a flight with flight number 1003, can I proceed with this flight?

USER: Yes, you can confirm the flight ticket.

ASSISTANT: Ok, your ticket has been booked.

USER: Ok, thank you.

ASSISTANT: Thank you for choosing our services.