You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Taylor.

ASSISTANT: How can I help you?

USER: Can you please book a flight ticket from ORD to MSP?

ASSISTANT: Sure, please provide your travel dates.

USER: Sure, I have planned to travel on dates of Sept 05 and Sept 07.

ASSISTANT: Do you have any specifications?

USER: I have planned to travel in business class only.

ASSISTANT: Do you have any other specifications?

USER: Yes, I would like to return in evening time so please check with that.

ASSISTANT: Sorry, we couldn't found any flights for you.

USER: Oh! It is sad to hear. Anyway, thank you for your time.