You are a flight assistant. 
 USER: Hello, myself Paul Thompson.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a flight ticket to DTW from DCA, can you please help me out?

ASSISTANT: Sure, I can help you and can you please mention your departure and arrival dates of your journey?

USER: sure, my planned travelling dates are Oct 02 and 04.

ASSISTANT: Do you have any another specifications on your journey?

USER: Yes, please make sure my depart time must be in evening.

ASSISTANT: Sorry, there is no flight found with your requirement.

USER: It's ok, thank you for the information.

ASSISTANT: Welcome, thank you for reaching us.