You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Gregory Perez, want to travel from PHX to DTW. Can you please help me?

ASSISTANT: Gregory Perez, I am glad you have contacted us. I will help you.

USER: Thank you.

ASSISTANT: Please help me with your planned travel dates.

USER: My travel dates are from 01/26 to 01/28.

ASSISTANT: Do you need a direct or connecting flight?

USER: I want a direct flight.

ASSISTANT: Please help me with your preferred depart and arrival time.

USER: I would like to return back in the afternoon.

ASSISTANT: Do you have any other preferences in your journey?

USER: No, thanks.

ASSISTANT: Gregory Perez, I am really sorry that there are no active flights available for your journey.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us. Have a great time.