You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Mary King here, I would like to book a ticket from ORD to MSP. can you please help me to book a ticket?

ASSISTANT: Sure, we are here to help you. Can you please help me with your travel dates?

USER: My travelling dates will be on 03/21 to 03/23.

ASSISTANT: Ok, please wait a moment.

USER: I need a direct flight. Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for reaching us, have a good day.