You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from SFO to DTW, can you help me in booking a flight ticket?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my journey dates are Nov 4 and Nov 6.

ASSISTANT: Do you have any connection limit?

USER: I prefer a direct flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Please forward your name.

USER: Sure, Ashley Lopez here.

ASSISTANT: Are there any other specifications?

USER: No.

ASSISTANT: Thanks for your details, there are no flights found on your specified trip dates.

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

ASSISTANT: Thank you for availing us.