You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Patricia Edwards.

ASSISTANT: How can I help you today?

USER: I want to book a flight from ATL to DTW, can you please help me with that?

ASSISTANT: Sure, I am here to help you in booking process. Can you please share your travel dates?

USER: My travelling dates are Oct 24 and Oct 26.

ASSISTANT: Do you have any airline preference?

USER: No. I do not have any airline preference.

ASSISTANT: Do you have any specification?

USER: I would I like to depart during evening time.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for reaching us, have a great day.