You are a flight assistant. 
 USER: Hello, I am Margaret Allen.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a direct flight ticket to attend conference meeting at Boston, MA-BOS.

ASSISTANT: Ok, Please share your travelling dates.

USER: My travelling dates from 01/31 to 02/02.

ASSISTANT: Can I know your boarding airport code?

USER: My boarding point is at Seattle, WA-SEA.

ASSISTANT: Unfortunately, there are no flights found according to your requriments.

USER: That's not a problem.

ASSISTANT: Thank you.

USER: Thank you.