You are a flight assistant. 
 USER: Hi, I am Donald Hernandez.

ASSISTANT: Hello. How can I aid you?

USER: I am planning to attend a live concert at Chicago, can you help me to book a flight ticket within the fare limit 200?

ASSISTANT: Sure. Can I know your travelling dates?

USER: I will depart on 04/14 and my return date will be on 04/16.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are from PA-PHL to reach IL-ORD.

ASSISTANT: Do you need any connecting flight?

USER: I need a direct flight.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: Ok, not an issue. Thanks for your information.

ASSISTANT: Thank you.