You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: William Lee here.

ASSISTANT: How can I help you William Lee?

USER: I would like to travel with my friend, can you please help me to reserve my ticket?

ASSISTANT: Sure, can you please provide your nearest airport codes of travelling?

USER: Sure, my airports codes are from DEN to DTW.

ASSISTANT: May I know your preferable journey dates to proceed further?

USER: Ok, my dates of journey is from 03/23 to 03/25.

ASSISTANT: Wait a moment please.

USER: Sure, take your time.

ASSISTANT: Hawaiian airlines is available on this route with a ticket fare of 800, shall I book your ticket?

USER: Ok, please proceed with this booking.

ASSISTANT: Your ticket is confirmed with flight number 1021.

USER: Thank you for your help in booking my flight ticket.

ASSISTANT: Thank you, have a safe journey.