You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jerry Wright.

ASSISTANT: How may I aid you?

USER:  I am planning to attend Orientation in Temple University which is at Washington IAD, Could you please help me in booking a ticket?

ASSISTANT: Sure, I will help you with that. May I know your origin code please?

USER: My origin airport code is PHL.

ASSISTANT: Ok, can I know your trip dates to proceed further?

USER: My trip dates are 01/21 and 01/23.

ASSISTANT: Sorry, there are no flights available for you in this route.

USER: Ok, fine thank you for checking.

ASSISTANT: Thank you for approaching us.