You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Shirley Lopez. I am planning to participate in NBA tournament in PHX. Can you book me a ticket from DTW?

ASSISTANT: Sure, may I know your travelling dates?

USER: I would start on Sept 13th and return on Sept 17th.

ASSISTANT: May I know your connection limit?

USER: I need 1 stop over.

ASSISTANT: Do you have any class preference?

USER: I am fine with any class.

ASSISTANT: May I know your return and depart timing?

USER: I need to depart in the afternoon.

ASSISTANT: There are no flights available.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.