You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: My name is Dorothy Rodriguez. I want to book a flight ticket from WA - SEA to DC - DCA to meet my relatives. please help me in booking a flight ticket.

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are from 07/02 to 07/04.

ASSISTANT: Do you have any preferences?

USER: Yes, I need a halt in between my journey.

ASSISTANT: Thanks for your details, please hold on.

USER: Sure.

ASSISTANT: Thanks for waiting. There are no flights found on your data.

USER: No problem, thanks for your information.

ASSISTANT: Thank you.