You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you at this moment?

USER: I am planning to attend a meeting conference at Dallas DFW.  Could you please help me with booking a flight ticket from OAK?

ASSISTANT: Sure, I will help you with that. Can you please provide your planned dates of journey?

USER: I need to start my journey on 12/19 and return back on 12/21.

ASSISTANT: Please wait a moment to check the flights availability.

USER: Ok, I will wait for your response.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Southwest airlines. Shall I proceed with this?

USER: If it is a direct flight, you can proceed with that booking.

ASSISTANT: Sorry, there are no direct flights available in your route.

USER: It's ok, no problem.

ASSISTANT: For documentation purpose, may I know your name please?

USER: Myself Melissa Hall.

ASSISTANT: Ok Hall, thank you for reaching us, have a great day.

USER: Thank you for helping me.