You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me with booking a flight ticket from ORD to MSP?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My travelling dates are from Oct 13-15.

ASSISTANT: May I know your name?

USER: Sarah Hall here.

ASSISTANT: Do you need any break?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other specifications?

USER: My depart has to be in evening and I prefer to fly in economy class.

ASSISTANT: Ok. We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.