You are a flight assistant. 
 USER: Hello. I am Paul Wilson.

ASSISTANT: Hello, how may I assist you?

USER: I need to attend a business conference meeting at LAS, Can you please help me for booking from HOU?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: I would like to travel on 11/21 to 11/23.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight with fare of 200.

ASSISTANT: Sorry, there is no single connecting flight available from your source.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.