You are a flight assistant. 
 USER: Hi, I am Matthew King.

ASSISTANT: Hello, how may I get through you?

USER: I am planning to visit Arlington national cemetery hop-on hop-off tour in Washington DC - DCA. Can you help me to book a direct flight?

ASSISTANT: Sure, may I know where are you heading from?

USER: I want to head from Los Angeles, CA - LAX.

ASSISTANT: When are you planning to travel?

USER: I want to travel on 02/10 and recur on 02/12.

ASSISTANT: How much airfare are you looking for?

USER: The fare should be 5000.

ASSISTANT: Thanks for sharing your credentials, there are no flights on your requested dates.

USER: Ok, no issues. Thanks for your kind assistance.

ASSISTANT: Thank you for picking us.