You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Katherine Robinson. I am planning to conduct a sports festival at Chicago. Can you help me in my booking?

ASSISTANT: Sure, may I know your trip dates?

USER: I will start my journey on 12/22 and again I will return on 12/24.

ASSISTANT: Where do you want to board and land at?

USER: My source airport code is PA - PHL. My destination is IL - ORD.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Currently, there are no flights available on your preferred dates.

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

ASSISTANT: Thank you for reaching us.