You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me in booking the flight ticket from DFW to LAS?

ASSISTANT: Sure, can you please mention your departure and arrival dates of your journey?

USER: My journey dates are May 5 and May 7.

ASSISTANT: Do you need any layover in between  journey?

USER: I need a single connection flight.

ASSISTANT: At what time are you planning to depart and return?

USER: I would like to return in the evening.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in business class.

ASSISTANT: May I know your name please?

USER: Paul Miller.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes.

USER: Oh! Not an issue, I will find an other way to reach my destination. Anyway, thank you for the information.

ASSISTANT: You are most welcome.