You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Donna Baker here.

ASSISTANT: How can I help you?

USER: I want to attend my friend's wedding, please book my ticket from ATL to ORD.

ASSISTANT: Sure, can you please tell your travelling dates?

USER: My trip dates are 02/18 and 02/20.

ASSISTANT: For your destination I found a flight from UA airlines with 2 connection and ticket price is just 100. Shall I proceed with reservation process?

USER: I need 1 connection.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: No problem, thank you.

ASSISTANT: Thank you and have a nice day.