You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Barbara Walker want to visit PHX, can you book a ticket from DEN?

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

USER: Sure, my travelling dates will be 08/01 and 08/03.

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

USER: Ok.

ASSISTANT: Thank you for your waiting, I found a flight for you in Frontier airlines with fare 100. Can I proceed?

USER: Ok, proceed with my booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1016.

USER: Thank you.

ASSISTANT: Thank you for approaching us.