You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Help me to book a flight ticket to Houston TX-IAH to attend a trade fair. My source point is NC-CLT.

ASSISTANT: Could you please put forward your travel dates?

USER: I will travel on 03/01 and return on 03/03.

ASSISTANT: May I know your name, please?

USER: My name is Timothy Moore and I need connection limit of one.

ASSISTANT: Sorry, there are no flights available.

USER: Ok, thanks for the information.

ASSISTANT: Thanks for approaching us.