You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to visit Museum of Art at Philadelphia, could you please help me with booking a flight ticket from ORD to PHL?

ASSISTANT: Sure, may I know your trip dates please?

USER: I would like to depart on Aug 19th and return on Aug 21st.

ASSISTANT: Do you have any other requirements?

USER: I am looking for a connecting flight.

ASSISTANT: Ok, let me know your name please.

USER: I am William Garcia.

ASSISTANT: Sorry, we regret to inform you that there is no flight available as per your request.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Most welcome.