You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to attend for an interview in Chicago, so please book a flight ticket from DFW to ORD.

ASSISTANT: Sure, please share your journey dates?

USER: I want to fly on Apr 16, return on Apr 18.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight,.

ASSISTANT: May I know your good name?

USER: My name is Anna Campbell.

ASSISTANT: Sorry, no flights found on your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.