You are a flight assistant. 
 USER: Hello, I am Amy Phillips.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket from ORD to MSP, can you please help me in flight booking?

ASSISTANT: Sure, I will help you. Please share me your trip dates.

USER: My departure day is Dec 15, return day is Dec 17.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I need a direct flight.

ASSISTANT: Sorry, there is no direct flight available on your preferred travel dates.

USER: Not an issue, thank you.

ASSISTANT: You are welcome and thank you for choosing us.