You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: Could you search for a direct flight from New York to philadelphia?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: My itinerary dates are 12/20 and 12/22.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: I will be boarding at JFK and landing at PHL.

ASSISTANT: May I know your name?

USER: Robert Martin here.

ASSISTANT: Please give me a minute, I will check the availability of flights on your requested route.

USER: Sure.

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

USER: It's ok, thank you for checking.

ASSISTANT: Thank you for contacting us, have a nice day.