You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Ronald Green.

ASSISTANT: Ronald Green, how may I assist you today?

USER: Can you please book a flight ticket from IAH to DTW?

ASSISTANT: Sure, I will help you. Please let me know with your planned travel dates.

USER: My journey dates are, depart on June 7th, and return back on June 9th.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need  a connection in between journey.

ASSISTANT: Please help me with your depart and return time.

USER: My depart time should be in the evening.

ASSISTANT: Please let me know if you have any other preferences in your journey?

USER: No.

ASSISTANT:  Ronald Green, I am really sorry to say that  there are no active flights available for your journey.

USER: Ok, no problem. Thank you.

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