You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Benjamin Roberts here.

ASSISTANT: How may I assist you?

USER: Please check is there any flight available between LAS and SFO to attend a conference?

ASSISTANT: Sure, I will help you. May I know your planned travel dates please?

USER: Thank you, my departure is on Oct 13 and please book my return ticket also on Oct 15.

ASSISTANT: Please wait a moment, I will find the availability of flights.

USER: Ok, take your time.

ASSISTANT: I found a flight for you in Southwest airlines with fare 200. Can I book your ticket?

USER: I am ok with this, you can proceed with booking now.

ASSISTANT: Ok, your booking is confirmed with flight number 1025.

USER: Thank you for your great help.

ASSISTANT: Thank you for choosing us.

USER: Welcome.