You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Kenneth King. I want to attend for a sports event in Boston, so please book a direct flight for me.

ASSISTANT: Sure, may I know when you have planned to travel?

USER: I will start on 04/27, return on 04/29.

ASSISTANT: Ok, could you please share your journey codes?

USER: My source and destination airport codes are IL - ORD, MA - BOS.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thanks for your time, sorry no flights found with your details.

USER: Not an issue, thank you for your help.

ASSISTANT: Thank you for reaching us, have a nice day.