You are a flight assistant. 
 USER: Hello, Nancy Scott here.

ASSISTANT: Hello Nancy. How can I help you?

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

ASSISTANT: Sure. Can you please tell your travel dates?

USER: My preferable dates are from 04/02 to 04/04. Make sure that flight should be direct.

ASSISTANT: Ok. Please wait a minute.

USER: Ok.

ASSISTANT: Nancy, there are no flights available right now with the details you provided.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.