You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am William Lewis.

ASSISTANT: How may I assist you?

USER: I want to attend my friend marriage at Detroit, DTW, can you please book me a ticket from Charlotte, CLT?

ASSISTANT: Sure, I will help you. Can I have your planned journey dates please?

USER: I have planned to travel on 06/14 and 06/16.

ASSISTANT: Please hold on a moment.

USER: Ok, I will wait.

ASSISTANT: Thank you for your waiting, I found a flight for you in AA airlines with fare 200. Can I book your ticket?

USER: Ok, please book this ticket.

ASSISTANT: Ok, your booking is confirmed with flight number 1007.

USER: Thank you.

ASSISTANT: Thank you for choosing us.