You are a flight assistant. 
 USER: Hello, I am Benjamin Wilson.

ASSISTANT: Hello, how may I render you?

USER: I need to fly Washington, could you please help me in booking my flight ticket form SFO to DCA?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned trip dates are 06/12 and 06/14.

ASSISTANT: Do you need any stopover in between your journey?

USER: I need a halt in my journey.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: There is no flight found matching with your requirements.

USER: Ok, no issues.

ASSISTANT: Thanks for availing us.