You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I want to attend the seminar from DC-DCA to CA-OAK.Can you please help me out?

ASSISTANT: Sure, could you please provide the travel dates?

USER: The travelling dates are from 05/06 to 05/08.

ASSISTANT: Sorry, there are no flights found on your dates.

USER: OK, It's fine.

ASSISTANT: May I know your name for documentation purpose?

USER: Sure, my name is Pamela Walker.

ASSISTANT: OK Pamela, thank you. Have a nice day!.

USER: Thank you.