You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: I want to book a ticket from DTW to SFO, can you help me?

ASSISTANT: Sure, May I know your travelling dates?

USER: My travel dates are Mar 16 and 18.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Any other preferences?

USER: I want to travel in economy class.

ASSISTANT: May I know your name?

USER: I am James Carter.

ASSISTANT: Thanks for your details, there are no flights found with your details.

USER: No problem, thanks for checking.

ASSISTANT: Thank you.