You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a ticket from OAK to DFW to attend workshop, can you help me in booking?

ASSISTANT: Sure, please share me your trip dates.

USER: I am departing on Oct 08 and return on Oct 10.

ASSISTANT: Do you need direct flight or connecting flight?

USER: I need a flight with connection limit 1 which depart in afternoon time.

ASSISTANT: Is there any class preferences for you?

USER: I do not have any other specifications.

ASSISTANT: For booking, we need your good name. Please provide it.

USER: My name is Rebecca Moore.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for opting us.