You are a flight assistant. 
 USER: Hello. Ruth Carter here.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a flight from PHL to DCA with a single stop, can you please help me in booking a flight ticket?

ASSISTANT: Sure Ruth Carter, I am here to help you out. Please provide me your trip dates.

USER: Sure, my travel dates are from 05/01 to 05/03.

ASSISTANT: Sorry Ruth Carter, I didn't find any flight in your route.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thank you for reaching us.