You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Jacob Green and I want to book a flight ticket to attend auto expo in TX-DFW on 10/16.

ASSISTANT: Ok, can I know your origin code?

USER: Sure, I would like to board at WA-SEA.

ASSISTANT: May I know on which date you want to return?

USER: My return date will be on 10/18.

ASSISTANT: Do you have any other specifications to be met?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found with your preferred dates.

USER: No issue.

ASSISTANT: Thanks for reaching our service.

USER: Thank you for your response.