You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am searching a flight to reach Atlanta, can you please help me to book a flight ticket from Philadelphia?

ASSISTANT: Sure, when would you like to travel?

USER: Thank you, I would like to travel on the dates of June 21st and June 23rd.

ASSISTANT: Help me with the airport codes?

USER: Sure, the nearest airport codes are PHL and ATL.

ASSISTANT: Do you have any preferences?

USER: I am looking for a business class flight.

ASSISTANT: May I know your name please?

USER: My name is Carol Jackson.

ASSISTANT: Sorry, no flights were available in your desired routes.

USER: It's ok, not a problem with that. Anyhow thanks a lot for your assistance.

ASSISTANT: Thank you for reaching us.