You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you please book me a plane ticket from DTW to BOS?

ASSISTANT: Sure, can you please tell me your trip dates?

USER: Sure, my trip dates are from 11/13 to 11/15.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: May I know your name please?

USER: My name is Jacob Young.

ASSISTANT: Sorry Jacob, there are no flights available on your preferred dates.

USER: It's ok, thank you.

ASSISTANT: Thank you for contacting us and have a nice day.