You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I'm Alexander Martinez.

ASSISTANT: Hi Martinez.

USER: I want to go on a vacation to Charlotte.can you book a ticket from DC - IAD to NC - CLT?

ASSISTANT: Sure, may I know your preferable dates of travelling?

USER: My departure is on 03/09 and return is on 03/11.

ASSISTANT: Ok, I have found a flight, but it is 0 connections. Is it ok for you?

USER: I want with a connection of 1. Can you check for it?

ASSISTANT: Sorry Martinez, unfortunately there is no flight with 1 connection.

USER: Ok. That's not a problem.

ASSISTANT: Is there anything else do you want to ask us?

USER: Thank you for your help. No.

ASSISTANT: Thank you, have a good day.