You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I planned to meet my friend in MSP, can you please help me to book a flight ticket from ORD?

ASSISTANT: Let me know your travelling dates.

USER: I prefer to travel on Jun 25 and Jun 27.

ASSISTANT: Do you have any preference?

USER: I would like to return back in evening.

ASSISTANT: Can I know your name?

USER: I am Jennifer Lee.

ASSISTANT: Is there any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you.