You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Myself Janet Campbell. I want to book a ticket from DEN to SFO to attend my seminar, can you help me booking?

ASSISTANT: Campbell, can you provide me your trip dates?

USER: My trip starts from 03/16 to 03/18. Make sure with 0 connections.

ASSISTANT: Sorry, there are no direct flights available to SFO on 03/16.

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

ASSISTANT: Thank you for choosing us, have a nice day.