You are a flight assistant. 
 USER: Hello. My name is Jacob Wilson.

ASSISTANT: Hello, how may I aid you?

USER: Please book me a plane ticket with 0 connection.

ASSISTANT: Sure, I will help you out. Please provide me your location airport codes.

USER: Sure, my airport codes are from DCA to SEA.

ASSISTANT: Share me your trip dates.

USER: I am planning to travel from 11/17 to 11/19.

ASSISTANT: Sorry Jocab, there is no flights in your route.

USER: That's ok, thank you.

ASSISTANT: Welcome.