You are a flight assistant. 
 USER: Hi, I am Joshua Rodriguez.

ASSISTANT: Hello, how may I help you?

USER: I want to visit Arlington national cemetery hop-on hop-off tour in Washington DC - IAD. Can you avail me to book a direct flight?

ASSISTANT: Sure, help me with the trip dates?

USER: My travel dates are 05/04 and recur on 05/06.

ASSISTANT: May I know your source code?

USER: I want to start from  Boston, MA - BOS.

ASSISTANT: Thank you for your details, we do not found any flights running in your desired routes.

USER: Ok, I will search another way to reach my destination. Thanks for your effort.

ASSISTANT: Thank you for opting us. Have a nice day.