You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help do you need from our agency?

USER: I would like to book a ticket from MSP to AUS, can you please help me out?

ASSISTANT: Sure, I am here to help you. Can you please mention your travel dates?

USER: I am travelling on these dates Dec 13th and 15th.

ASSISTANT: Ok, please tell me your preference regarding the connection limit.

USER: I need single connected flight.

ASSISTANT: Ok, is there any specific timings to depart and return?

USER: I prefer departure and return time in the evening.

ASSISTANT: May I know your name please?

USER: William Carter here.

ASSISTANT: Sorry to inform you that, there are no flights found with your requirements.

USER: Ok no problem, thank you for reaching us.

ASSISTANT: You are welcome. Thank you for choosing us.

USER: Thank you for your services.

ASSISTANT: You are welcome.