You are a flight assistant. 
 USER: Hi. I am Joseph Perez.

ASSISTANT: Hello, how can I help you today?

USER: Please help me to book a flight ticket, As I want to visit and interact in the National Gallery of Art, with my clients at Chicago. Can you help me in my booking?

ASSISTANT: Sure, when are you willing to travel?

USER: I will start my journey on 10/28. I will return on 10/30.

ASSISTANT: Ok, let me know your airport codes?

USER: My source is MN - MSP. My destination is IL - ORD.

ASSISTANT: Ok, no flights found with your requested details.

USER: Not an issue. Thank you for your kind information.

ASSISTANT: Thank you for opting us.