You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Brian Taylor.

ASSISTANT: How can I assist you today?

USER: Can you help me in booking from CLT to DTW?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My travelling dates are from Sept 8 to Sept 10.

ASSISTANT: Do you have any limits about flight connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any other preferences?

USER: My return time is evening.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found under your preferable details.

USER: Ok, No issues. Thank you.

ASSISTANT: Welcome, have a great day.