You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please share your planned travel dates?

USER: My travelling dates are from June 26 to June 28.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other preferences?

USER: I want to return in evening time.

ASSISTANT: Can I have your name please?

USER: My name is Pamela Scott.

ASSISTANT: Sorry, no flights found with your given details.

USER: Ok, no issues, thanks for the information.

ASSISTANT: Thank you for opting us.