You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am David White. I want to travel on these days that is on 07/14 and return on 07/16. Can you make a reservation for me?

ASSISTANT: Ok, may I know your travelling airport codes for this journey?

USER: Ok, my source is LAS and the destination is BOS.

ASSISTANT: Flight-1021 is available for you with 1 connection at the price of 100 by Frontier airlines, may I book it for you?

USER: Please proceed.

ASSISTANT: Your booking is done.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.