You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for today?

USER: Can you help me to book a flight from SEA to DFW?

ASSISTANT: I am happy to help you in booking your flight ticket. Can you please let me know your planned dates of journey?

USER: My travelling dates are Apr 20 and 22.

ASSISTANT: Do you need any connecting flight for your journey?

USER: I prefer direct flight.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: Sure, my name is Janet Edwards.

ASSISTANT: Is there any other limitations for your journey to met with?

USER: No.

ASSISTANT: Sorry Janet Edwards, there are no flights which travels to your region.

USER: No issues, thank you for your response.

ASSISTANT: You are welcome, thank you for reaching us.