You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to attend a seminar on automation, could you book my ticket from SFO to CLT?

ASSISTANT: Sure, I am here to help you for this. When are you planning your trip?

USER: My itinerary dates are Feb 4 and Feb 6.

ASSISTANT: Do you have any other specifications regarding your journey?

USER: I need a direct flight.

ASSISTANT: May I know your name please?

USER: Robert Brown here.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your requirements.

USER: No problem, thank you.

ASSISTANT: Thank you very much for contacting our agency.