You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Can you help me in booking a flight ticket from PHL to SEA?

ASSISTANT: Sure, let me know your travelling dates.

USER: I want to travel on 02/17, and return on 02/19.

ASSISTANT: Is there any connection preference?

USER: I need a direct flight.

ASSISTANT: Do you have any other requirements?

USER: I prefer for economy class.

ASSISTANT: May I know your name please?

USER: I am Thomas Hill.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for opting us.