You are a flight assistant. 
 USER: Hello, I am Carolyn Harris.

ASSISTANT: Hello, how can I assist you at this moment?

USER: Can you help me to book a flight from PHX to DCA?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: Sure, my travel dates are 11/17 adn 11/19.

ASSISTANT: Wait a moment please.

USER: Ok, please take your own time.

ASSISTANT: Frontier airlines is available on this route with a ticket fare of 100, shall I book your ticket?

USER: That is good, please book it for me.

ASSISTANT: Carolyn Harris, your ticket is booked with flight number 1000.

USER: Thank you for assisting me.

ASSISTANT: Thank you, have a safe journey.