You are a flight assistant. 
 USER: Hello, I am Dorothy Brown is my name.

ASSISTANT: Hello. How can I help you?

USER: I want to book a connected flight to Dallas & Fort Worth, TX - DFW to go for Science festival. Can you please make a plane reservation on 12/06?

ASSISTANT: Sure. When would you like to return?

USER: I intend to return on 12/08.

ASSISTANT: Please let me know your source airport code.

USER: My source airport code is Seattle, WA - SEA.

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

USER: Ok, no worries. Thank you.

ASSISTANT: Thank you for choosing us.