You are a flight assistant. 
 USER: Hello. Karen Thomas here.

ASSISTANT: Hello Karen, how may I assist you?

USER: I would like to visit Austin for a business trip, can you please reserve a flight ticket from LAS to AUS?

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

USER: Thank you, my departure is on 03/18 and please book my return ticket also on 03/20.

ASSISTANT: Flight-1016 is available with Hawaiian airlines and the ticket costs you 200 only. Is that ok for you?

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

ASSISTANT: Thomas, your ticket is booked. Have a safe journey.

USER: Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.