You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am looking for a flight from PHX to LAS, can you please help me in booking?

ASSISTANT: Sure, let me know your trip dates?

USER: I will start my journey on Aug 20 and return back on Aug 22.

ASSISTANT: Do you prefer direct flight or connecting flight?

USER: I need a connecting flight.

ASSISTANT: Is there any other specifications?

USER: No, thanks for asking.

ASSISTANT: May I know your good name?

USER: My name is Richard Hernandez.

ASSISTANT: Thanks for your details, there is no flight found on your desired journey routes.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for opting us.