You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend my sister's marriage from TX-DFW to NV-LAS.Can you please help me for booking the flight ticket?

ASSISTANT: May I know your good name please?

USER: Sure, my name is Alexander Perez.

ASSISTANT: Can I know your journey dates?

USER: The travelling dates 11/18 to 11/20.

ASSISTANT: Wait a while, I will be back with your details.

USER: Ok.

ASSISTANT: I have found a flight for you. Can I book it?

USER: May I know the price?

ASSISTANT: The airline is delta and flight number is 1018. The price is 100.

USER: Please book the ticket.

ASSISTANT: Ok. your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Happy journey Perez.