You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Shirley Evans, want to travel from OAK to LAS. Please help me in booking my ticket.

ASSISTANT: Sure, can you please provide your planned dates of travelling?

USER: My travelling dates are from 12/18 to 12/20.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Sure.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Southwest airlines. Shall I proceed with this?

USER: Yes, please proceed.

ASSISTANT: Ok, your ticket has been booked in flight number 1013.

USER: Thank you.

ASSISTANT: Thank you for reaching us, have a great day.