You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to prefer a economy class flight for my business trip to Los Angeles. So can you book the flight ticket for me?

ASSISTANT: Sure, may I know your airport codes?

USER: The airport codes are from MSP to LAX.

ASSISTANT: May I know your planned trip dates?

USER: The trip dates are from Nov 09 to Nov 11.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection limit.

ASSISTANT: May I know your arrival and depart timings?

USER: The depart time would be afternoon. That is it.

ASSISTANT: May I know your good name?

USER: I am Emily Allen.

ASSISTANT: Please be on hold.

USER: Sure.

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

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for availing us.