You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I want to enjoy my holiday at Las Vegas with my friend, could you book my ticket from DEN to LAS?

ASSISTANT: Ok, may I know your travelling dates?

USER: My itinerary dates are 09/21 and 09/23.

ASSISTANT: Here is a single connection flight with fare 100 and UA as airline. Shall I proceed for booking?

USER: Please reserve my ticket.

ASSISTANT: Ok, your ticket is confirmed.

USER: Thank you for your service.

ASSISTANT: May I know your name?

USER: My name is Debra Turner.

ASSISTANT: Thank you for reaching us.