You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me to search a flight with 1 connection limit in the month of  October?

ASSISTANT: Sure, may I know your travelling dates?

USER: The travelling dates are 10/18 to 10/20.

ASSISTANT: May I know your airport codes?

USER: The airport codes are from PA-PHL to DC-DCA.

ASSISTANT: May I know your name?

USER: Sure, my name is Charles Garcia.

ASSISTANT: Sorry, there is no flight under your requested dates.

USER: No problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.