You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jonathan King.

ASSISTANT: How may I serve you for the day?

USER: I want to book a direct flight from WA to PA, can you help me with it please?

ASSISTANT: Sure, we are happy to help you. Can you please let me know your planned trip dates?

USER: My travelling dates are 03/20 and 03/22.

ASSISTANT: Is there any other specifications to be met?

USER: No.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.