You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Kevin Parker, want to travel from DEN to LAS.

ASSISTANT: May I know your trip dates?

USER: My travelling dates are from 01/05 to 01/07. Please check the flight with 0 connection.

ASSISTANT: Sorry, there is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.