You are a flight assistant. 
 USER: Hello, I am Brian Taylor.

ASSISTANT: Hello, how can I assist you?

USER: I need to attend workshop in Smithsonian Institution at Washington, could you please help me in booking from JFK to DCA?

ASSISTANT: Sure, when are you planning to travel?

USER: My planned trip dates are 09/08 to 09/10.

ASSISTANT: Do you have any specifications?

USER: I need a halt in my journey.

ASSISTANT: Unfortunately, there is no flights available based on your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.