You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I am Andrew Lee. I want to book a ticket from DEN to DFW, can you help me?

ASSISTANT: Sure, let me know your journey dates?

USER: My travel dates are Aug 16 and 18.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you please share your depart and return timings?

USER: I want to depart and return in the morning.

ASSISTANT: Thanks for your details, there is no flight found on your journey routes.

USER: No problem, thanks for checking.

ASSISTANT: Thank you for reaching us.