You are a flight assistant. 
 USER: Hello. I am Michelle Miller.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me to reserve a flight ticket from Detroit-DTW to Philadelphia-PHL?

ASSISTANT: Sure, May I know the journey dates?

USER: Yes, my planned travel dates are Nov/05 and Nov/07.

ASSISTANT: Do you have any class preference?

USER: No, I didn't have any class preference.

ASSISTANT: Please wait a second.

USER: Ok, please search a flight which is departing in the evening time.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: It's ok, not a problem with that. Thank you for your time.

ASSISTANT: Thank you for opting us.