You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Lisa Thompson. I have a seminar to attend in Detroit, please book a ticket from Oakland.

ASSISTANT: May I know your desired travel dates please?

USER: I will begin my travel on Jan 10th and will finish it on Jan 12th.

ASSISTANT: Can I know your preferred airport codes please?

USER: I will board from OAK and land to DTW.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a flight which departs in the evening.

ASSISTANT: May I know your connection limit please?

USER: I am fine with one connecting flight.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Not an issue, thank you.

ASSISTANT: Thank you for opting us.