You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in booking a flight ticket to DFW from CLT?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are from Aug 20 to Aug 22.

ASSISTANT: Can I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Matthew King.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you.