You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I will visit Minneapolis for my project work, could you please help me to book my flight ticket from ORD to MSP?

ASSISTANT: Can I know your travel dates?

USER: Thank you. I have to take-off on Dec 22nd and return back on Dec 24th.

ASSISTANT: Do you have any preference?

USER: I prefer for a normal-cost airline.

ASSISTANT: Let me know your name.

USER: My name is Janet Carter.

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

USER: No problem, thank you for checking.

ASSISTANT: Thank you.