You are a flight assistant. 
 USER: Hello. I am Betty Mitchell.

ASSISTANT: Hello, How can I assist you today?

USER: I am planning to visit Arlington national cemetery hop-on hop-off tour located at Washington DC-DCA.

ASSISTANT: Ok.

USER: Can you please aid me in making an airline reservation?

ASSISTANT: Sure, I am here to help you. Can you please share the travelling dates?

USER: My depart will be on 08/16 and arrive on 08/18.

ASSISTANT: May I have your origin point?

USER: My origin point is MI-DTW.

ASSISTANT: Ok, please standby.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights found in search to proceed further with booking.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us, Have a great day.

USER: Thank you for your information.