You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Justin Clark. I would like to meet my parents at Denver, CO-DEN on 11/06. Could you please help me with booking a flight ticket from Seattle, WA-SEA?

ASSISTANT: Sure, we will help you. May I know your return date?

USER: I intend to return on 11/08.

ASSISTANT: Do you need any other specifications?

USER: Yes, I need a halt in between the journey.

ASSISTANT: Ok, let me check the availability of flights.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight available as per your details.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.