You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Laura Scott want to visit DTW, can you book a ticket from SFO?

ASSISTANT: May I know your travelling dates please?

USER: Sure, my travelling dates will be 08/07 and 08/09.

ASSISTANT: I am sorry no flights found on your routes.

USER: That's ok, thank you.

ASSISTANT: Thank you.