You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: I need to travel from DEN to DFW, can you help me?

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are 05/30 and 06/01.

ASSISTANT: Please let me know your connection limit for your journey?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other preference?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Stephanie Collins.

ASSISTANT: Sorry, no flights available on your route.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.