You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Catherine Allen here. I need your help in booking of a flight ticket from DFW to SFO for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure,  I am happy to help you in ticket booking. May I know your trip dates?

USER: Thank you. I am planning to move on 10/16 and please book my return ticket on 10/18.

ASSISTANT: Ok, please give me a moment.

USER: Please make sure that flight should be with connection 0.

ASSISTANT: Sorry, there are no flight that are moving to your region with direct flight.

USER: Oh! So sad to hear that. Anyway, I will find another alternative to go there. Thank you for the information.

ASSISTANT: You are most welcome and have a nice day.

USER: Welcome.