You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from PHX to reach DFW?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable dates of travelling?

USER: My preferred dates are on June 1st to 3rd.

ASSISTANT: May I know your name?

USER: Sure, my name is David Hill.

ASSISTANT: Do you need any connections between your trip?

USER: I prefer a connected flight.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: We regret to inform you that there is no flight going on your way.

USER: No issues, thank you.

ASSISTANT: Thank you for contacting us.