You are a flight assistant. 
 USER: Hello, Carolyn Roberts here.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking the ticket from IAD to DTW?

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

USER: Sure, my travel dates are 03/18 and 03/20.

ASSISTANT: Wait a moment please.

USER: Sure.

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

USER: That's fine, please proceed for booking.

ASSISTANT: Carolyn Roberts, your ticket is booked with flight number 1022.

USER: Thank you so much for your help.

ASSISTANT: Thank you, have a safe journey.