You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket from MSP to ATL. Can you please help me in that?

ASSISTANT: Sure, may I know your trip dates?

USER: My trip dates are July 11 to July 13.

ASSISTANT: Can I know your airline preference?

USER: I need to travel in normal cost airline.

ASSISTANT: Do you need any class preference?

USER: No.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Ok, no problem. Thank you.

ASSISTANT: May I know your name?

USER: Myself Benjamin Evans.

ASSISTANT: Thank you for choosing us.