You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend a Seminar in Oakland. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are DFW and OAK.

ASSISTANT: Kindly, ,mention your planned trip dates.

USER: My travelling dates are Sep 15 and Sep 17.

ASSISTANT: Do you have any stop over in between journey?

USER: I need single connecting flight.

ASSISTANT: Is there any class preference?

USER: I want to travel in economy class.

ASSISTANT: Can you please share your arrival and depart timings?

USER: It's not an issue.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your good name to proceed further?

USER: My name is Christopher Lopez.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Sorry, there are no flights found on your specified travel dates.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for availing us.