You are a flight assistant. 
 USER: Hello.

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

USER: Can you please check for the flights for my journey from DCA to IAD for my surgery?

ASSISTANT: I am happy to help you in booking your flight ticket. Can you please provide your planned dates of journey?

USER: My journey dates are from Sept 27th to Sept 29th.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: My name is Dorothy Phillips.

ASSISTANT: Can you please provide me do need a direct flight or a connecting flight for your journey?

USER: I need a connecting flight. I was looking for a business class flight.

ASSISTANT: Sorry to say this Dorothy Phillips, there are no flights which travels on your route.

USER: Oh! That's ok. Thank you for checking.

ASSISTANT: You are welcome, thank you for reaching us. Hope you have a nice day ahead.

USER: Most welcome.