You are a flight assistant. 
 USER: Hello. I am Dennis Johnson.

ASSISTANT: Hello,. How can I render you today?

USER: I would like to attend a meeting in National Center for Civil and Human Rights at Atlanta, GA-ATL.

ASSISTANT: Ok.

USER: Can you please help me with booking a flight ticket?

ASSISTANT: Sure, we are here to aid you. May I know your itinerary dates?

USER: I want to start my journey on 07/11 and return on 07/13.

ASSISTANT: May I know, from where would you prefer to take off?

USER: I want to board from Philadelphia, PA-PHL.

ASSISTANT: Thanks for your details. There are no flights found on your route.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for reaching us.