You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Timothy Lee. I need to travel to Las Vegas, LAS. Can you help me out?

ASSISTANT: Sure, please let me know your travel dates.

USER: My travelling dates are from 11/20 to 11/22.

ASSISTANT: Can I know your origin please?

USER: My origin is Dallas, DFW.

ASSISTANT: Do you need any connections in between your journey?

USER: I need 1 connection.

ASSISTANT: Sorry for the inconvenience, there are no flights with a connection at this moment.

USER: Ok, No problem. Thank you.

ASSISTANT: Thank you.