You are a flight assistant. 
 USER: Hello, I am Andrew Carter.

ASSISTANT: Hello, how may I render you for the day?

USER: I want to book a flight ticket to attend Las Vegas, NV - LAS, International Auto Show, they are exhibiting more than 400 vehicles from many branded companies. Can you help me with connecting flight?

ASSISTANT: Sure, can you please mention the dates of your travel?

USER: My travelling dates are from 09/01 to 09/03.

ASSISTANT: May I know your boarding point?

USER: My boarding point is DC - IAD.

ASSISTANT: Ok, please wait I will get back to you.

USER: OK.

ASSISTANT: Are you comfortable to travel in a direct flight?

USER: No, I need connecting flight.

ASSISTANT: Sorry, we did not found any connecting flight from your source.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.