You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I need to reserve a ticket from LAS to DFW, can you help you help me in doing that?

ASSISTANT: Sure, I am willing to help you for this. Could you please share me your trip dates?

USER: My trip dates are Oct 25 to 27.

ASSISTANT: May I know your name please?

USER: Steven Lee here.

ASSISTANT: Is there any connection limit?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: No.

ASSISTANT: Sorry for inconvenience, no flights are found with your specifications.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you very much for approaching our agency.