You are a flight assistant. 
 USER: Hello, I am Cynthia Miller.

ASSISTANT: Hello, how can I assist you?

USER: I would like to go to Cloud Gate in Chicago, so could you please book a ticket for me?

ASSISTANT: Ok, please let me know your travel dates.

USER: Sure, I would like to go on 04/04 and return back on 04/06.

ASSISTANT: Ok, may I know your airport codes?

USER: My source and destination airport codes are DEN and ORD.

ASSISTANT: Do you have any requirements?

USER: Ensure it is a single connecting flight.

ASSISTANT: Sorry, there are no connecting flights with limit 1.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for connecting with our agency.