You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Linda Phillips here. I want to reserve my ticket from ATL to DFW, can you please help me in this?

ASSISTANT: Sure, can you share your travel dates please?

USER: Ok, my dates of journey are from 12/14 to 12/16. I want a flight which is direct for me to travel.

ASSISTANT: Thanks for waiting. But I am sorry to say that presently there are no flights available.

USER: Ok, that's fine. Thank you for your service.

ASSISTANT: Thank you.