You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Matthew Thompson.

ASSISTANT: How can I help you Thompson?

USER: I am planning to visit Denver, can you please book me a ticket from DCA to DEN?

ASSISTANT: Sure, please mention your travelling dates.

USER: My preferable journey dates are from 07/25 to 07/27.

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

USER: Please reserve my ticket with this flight.

ASSISTANT: Your ticket is booked with flight number 1002.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you so much.