You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you at this moment?

USER: Can you please search a flight ticket from SFO to CLT?

ASSISTANT: Sure, can you share me your travelling dates?

USER: My travelling dates are June 21 and June 23.

ASSISTANT: Do you have any class preference?

USER: I need economy class ticket.

ASSISTANT: Is there any other specifications?

USER: I want single connection flight.

ASSISTANT: May I know your name please.

USER: Myself Dennis Young.

ASSISTANT: Sorry, no flights are found on your travel dates.

USER: Ok, thanks for checking.

ASSISTANT: Thank you for opting us.