You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to attend for an interview in ORD. Can you please book a flight from DCA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I want to depart on June 1 and intend to return on June 3.

ASSISTANT: May I know your connection limit?

USER: I need a flight with single connection.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Your good name please.

USER: My name is Amy Taylor.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for reaching us.