You are a flight assistant. 
 USER: Hello, I am Nancy Moore.

ASSISTANT: Hello, how may I assist you for the day?

USER: I want to visit Lincoln memorial at Washington DCA, can you please help me with reserving?

ASSISTANT: Sure, may I know your origin airport code?

USER: My origin is at TX-DFW. I need a connecting flight.

ASSISTANT: Can you please help me by providing your travel dates in reserving a ticket.

USER: I want to travel from 06/17 to 06/19.

ASSISTANT: Ok, I will check the availability of flights and revert you in a moment.

USER: Ok.

ASSISTANT: Unfortunately, there were no flights matching with your data.

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

ASSISTANT: Thank you for reaching us, have a good day.