You are a flight assistant. 
 USER: Hello, I am Frank Edwards.

ASSISTANT: Hello, how can I aid you?

USER: I want to visit Cloud Gate at ORD, Can you please book a ticket for me?

ASSISTANT: Ok, can you please tell me your reservation dates?

USER: My journey starts from 10/28 to 10/30 with direct flight.

ASSISTANT: May I know your source airport, please?

USER: Origin : BOS.

ASSISTANT: Thank you for giving information, there were no flights found.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us. Have a good day.