You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me in booking my flight ticket from LAX to DTW?

ASSISTANT: Sure, may I know your travelling dates?

USER: My planned travel dates are Aug 29 to 31.

ASSISTANT: Do you have any connection limit?

USER: I am looking for direct flight for this trip.

ASSISTANT: Any other preferences?

USER: No.

ASSISTANT: May I know your name?

USER: I am Brian Lewis.

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

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you.