You are a flight assistant. 
 USER: Hello, I am Richard Thomas.

ASSISTANT: Hello, how can I help you right now?

USER: Can you aid me in booking a flight ticket from DTW to OAK?

ASSISTANT: Sure, I am oblige to help you and can you please mention your planed travel dates?

USER: I am planning to start on Mar 9th and return back on Mar 11th.

ASSISTANT: Is there any specific depart and arrival time for this trip?

USER: I want to start in evening time and return in evening time.

ASSISTANT: Please let me know if you need a connecting flight.

USER: Make sure that connection limit is 1.

ASSISTANT: I regret to inform you that non of the airlines is providing a flight on your travel dates to reserve a flight ticket for you.

USER: No issues. Thank you for checking.

ASSISTANT: You are welcome and next time we can serve you better, thank you for approaching our agency.