You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I would like to visit Washington. Can you help me in booking a ticket from PHL to DCA?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates too?

USER: My journey dates are from 04/01 to 04/03.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Ok, not an issue. Thanks for providing the information.

ASSISTANT: May I know your name please?

USER: Ashley Green here.

ASSISTANT: Thank you for reaching us.