You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please let me know how may I help you?

USER: Nicole Martin here. Can you please help me in booking a flight ticket from DTW to OAK?

ASSISTANT: Sure, I am here to help you in booking the flight ticket. Can you please help me with the travel dates?

USER: I would like to travel  Mar 23 and need to return on Mar 25.

ASSISTANT: Ok, please give me sometime to check the flight availability.

USER: Sure.

ASSISTANT: The Spirit airline is providing the service which is having a single halt and the ticket fare is 100. Can I proceed with the ticket booking?

USER: No, I need direct flight.

ASSISTANT: Sorry to inform you, there is no direct flight found in this route.

USER: No problem, thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us.