You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking a flight ticket from DEN to LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: I want to fly on Oct 15 and return on Oct 17.

ASSISTANT: Do you need any break in your journey?

USER: I need a single connection.

ASSISTANT: May I know your depart and arrival time?

USER: I am comfortable with any timings.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: Myself Jason Hill.

ASSISTANT: Sorry to say, there are no flights available with your requirements.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for opting us.