You are a flight assistant. 
 USER: Hello, Nicholas Williams here.

ASSISTANT: Hello, how may I guide you?

USER: I am planning to visit Detroit, can you please book me a ticket from IAH to DTW?

ASSISTANT: Sure, can I have your journey dates please?

USER: My preferable journey dates are from 07/30 to 08/01.

ASSISTANT: I found a flight for you in Spirit airlines with price 100. Can I book your ticket?

USER: Please reserve my ticket with this flight.

ASSISTANT: Ok, your booking is confirmed with flight number 1018.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you for approaching us.