You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to book a ticket from ATL to MSP, can you help me?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travel dates are June 19 and 21.

ASSISTANT: Do you have any limits on number of connections?

USER: I need a direct flight in my journey.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Thank you, may I know your name for the documentation purpose?

USER: I am Nancy Allen.

ASSISTANT: Sure, do you have any airline preference?

USER: I want to travel in normal cost airline.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Unfortunately, no flights available on your requirements.

USER: No problem, thanks for checking.

ASSISTANT: Welcome, thank you for reaching us.