You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER:  I am Linda Hernandez.

ASSISTANT: Ok.

USER: I want to join The University of Chicago  for my higher education at Chicago,IL-ORD.

ASSISTANT: Ok.

USER:  Can you book a ticket from DC-IAD?

ASSISTANT: Sure. Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: When do you want to start your journey?

USER: I will depart on 02/14.

ASSISTANT: Let me know your return date?

USER:  I will return on 02/16.

ASSISTANT:  Please wait a moment, I will check the flight availability and let you know.

USER: Ok.

ASSISTANT: Thank you for being patience. There are no flights found on your route.

USER: Thank you for your help.

ASSISTANT: Thank you for availing us.