You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I am Frank Davis. I am planning to attend my nephew birthday in Washington, so please help me in booking a flight ticket.

ASSISTANT: Sure, please share your corresponding airport codes?

USER: My airport codes are NY - LGA, DC - DCA.

ASSISTANT: Ok, help me with your connection limit?

USER: I need a direct flight.

ASSISTANT: Ok, when would you like me to book  a flight ticket?

USER: I want to fly on 01/03 and return on 01/05.

ASSISTANT: Sorry, we did not found direct flight on your requested dates.

USER: Not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you.