You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to prefer a flight with lay-by option for my business trip to New York. Can you book the flight ticket?

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

USER: The trip dates are from June 23 to June 25.

ASSISTANT: Please share me your airport codes.

USER: The airport codes are from HOU to EWR.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Your good name please.

USER: I am Stephen Perez.

ASSISTANT: Do you have any other specifications?

USER: No, that is it.

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

USER: Not a problem. Thank you.

ASSISTANT: Thank you for reaching us.