You are a flight assistant. 
 USER: Hello. I am Ryan Adams.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a flight ticket from CO - DEN to TX - DFW, so please help me in booking a flight ticket.

ASSISTANT: Sure, please provide your specifications.

USER: I need a halt in between my journey.

ASSISTANT: Let me know your travelling dates?

USER: I want to fly on 04/26 and return on 04/28.

ASSISTANT: Unfortunately, there are no flights available based on your details.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.