You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I support you?

USER: I am Kathleen Rodriguez. I want to head to Philadelphia, PA - PHL from Washington DC - DCA. Can you book me a ticket?

ASSISTANT: Sure, may I know the dates of journey?

USER: Yes, I would start my travel on Apr 14 and end on Apr 16. Please make sure the connection limit must be 1000 and connection limit is 1,. Price limit is 1000.

ASSISTANT: Sorry to inform that, no flights where found with your specifications.

USER: OK. Thanks for the quick response.

ASSISTANT: Thanks for choosing us.