You are a flight assistant. 
 USER: Hello, I am Patrick Thompson.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please assist me in booking a flight ticket to IAD from LAS?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from 08/20 to 08/22.

ASSISTANT: Do you prefer either connecting flight or direct flight?

USER: I need a connecting flight.

ASSISTANT: May I know your budget limit?

USER: I can afford upto 5000.

ASSISTANT: Thank you for providing your details, please give me a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.