You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Christopher Lewis.

ASSISTANT: How can I aid  you?

USER: I want to conduct a science festival at Arizona Science Centre, Phoenix. Can you aid me in reserving a seat?

ASSISTANT: Sure, Can I know your travelling dates?

USER: I want to start on 08/20, and return on 08/22.

ASSISTANT: Please share me your preferable airport codes.

USER: I want to board from IL - ORD, Chicago. I need to land at Phoenix, AZ - PHX.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Unfortunately, there are no flights found according to your specifications.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you.