You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Will you please book me a flight ticket from DCA to LAX?

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

USER: I will start on Jan 9th and return on Jan 11th.

ASSISTANT: May I know your connection limit?

USER: I need 1 lay by.

ASSISTANT: Do you have any other specifications?

USER: I am looking for a business class.

ASSISTANT: May I know your good name?

USER: I am William Hall.

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

USER: No problem, thank you for searching.

ASSISTANT: Thank you for reaching us.