You are a flight assistant. 
 USER: Hello, I am Laura Evans.

ASSISTANT: Hello, how may I aid you?

USER: Could you please book a flight ticket from Washington to Philadelphia on 08/09?

ASSISTANT: Sure. Could you please let me know your dates of travel?

USER: My departure day is 08/09, return day is 08/11.

ASSISTANT: Please let me know your airport codes?

USER: My source and destination airport codes are DC - IAD, PA - PHL.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: Sorry, there were no flights found on your specified connection limit.

USER: No problem, thank you for your service.

ASSISTANT: Thank you for reaching us.