You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book a flight ticket from DTW to OAK. Could you help me in booking?

ASSISTANT: Sure, I will help you with that. May I know your journey dates, please?

USER: My travelling dates are from Mar 03 - 05.

ASSISTANT: Do you have any limit on number of connections?

USER: I prefer for connecting flight.

ASSISTANT: May I know about your other requirements?

USER: I prefer to travel in normal-cost airline.

ASSISTANT: Let me know your good name to proceed further for documentation purpose.

USER: Timothy Rodriguez.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to say that, we have not found any flights running on your desired routes.

USER: That's ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.