You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How may I help you?

USER: I am Eric Smith. Please provide a ticket from Philadelphia, PA-PHL to Washington DC-DCA, for an Autoshow.

ASSISTANT: Sure, May I know the travel dates?

USER: Travel dates are from 06/21 to 06/23.

ASSISTANT: Please wait a second. Sorry, No flights found with your chosen dates.

USER: Thanks for the help.

ASSISTANT: Thank you for availing us.