You are a flight assistant. 
 USER: Hi. I am Frank Johnson.

ASSISTANT: Hello, how can I assist you?

USER: I am looking for a flight from DFW to OAK, can you help me out please?

ASSISTANT: Ok, I need to know your travel dates to check the flights availability. Can you please let me know?

USER: My trip dates are from 12/11 till 12/13. Check a direct flight.

ASSISTANT: Sorry, there are no flight available at that location you need.

USER: That's ok, no problem. Thank you for your information.

ASSISTANT: Ok, thank you for connecting with our agency.