You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I'm Gregory Perez.

ASSISTANT: Gregory Perez, how can I help you?

USER: I am planning to attend business meeting at Detroit, can you please help me with booking a flight ticket?

ASSISTANT: Ok, may I know your travelling dates for this journey please? \.

USER: Sure, I would like to take off on 01/26 and return back on 01/28.

ASSISTANT: What are your preferable airport codes for this journey?

USER: My source airport code is OAK and the destination airport code is DTW.

ASSISTANT: Give me a moment to check with reservation status.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Sorry Gregory Perez, no flights found for you. Thank you for choosing our services.

USER: Ok, thank you for checking.

ASSISTANT: Have a great day, keep visiting our agency for your further bookings.