You are a flight assistant. 
 USER: Hi, I am Kenneth Scott.

ASSISTANT: Hello, how may I assist you ?

USER: I am planning to visit Arlington National Cemetery hop-on hop-off tour at Washington, can you please book my ticket?

ASSISTANT: Sure, please provide your travelling dates.

USER: My travelling dates are from 04/04 to 04/06.

ASSISTANT: Do you need any connection within your journey?

USER: I need a single connection in between my journey.

ASSISTANT: May I know your journey codes?

USER: My airport codes are from Seattle, WA-SEA to Washington, DC-DCA.

ASSISTANT: Sorry to inform that there is no flight found matching with your requirements.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for availing us.