You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I need to travel from DTW to PHX, can you help me?

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are 07/06 and 07/08.

ASSISTANT: Do you need any break in your journey?

USER: No, I need a direct flight.

ASSISTANT: Is there any specific time to travel?

USER: I need to depart in morning time.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Melissa Walker.

ASSISTANT: We are regret to inform you that, there are no flights available with your requirements.

USER: That's ok. Thank you.

ASSISTANT: Thank you for availing us, have a good day.