You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be of your help?

USER: I am Patricia Lee. I would like to exhibit my arts at Arts Festival, Chicago. Can you help me in booking a ticket?

ASSISTANT: Sure, Please help me out by providing your travel dates.

USER: My journey dates are from 02/17 to 02/19. I need a 1 halt in my journey.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from PHL to ORD.

ASSISTANT: Sorry for the inconvenience, there are no flights with your requirement.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Have a nice day.