You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Can you please book me a ticket on dates from Sept 14 to Sept 16?

ASSISTANT: Can you help me with your airport codes?

USER: My origin is LAS and destination is SEA.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 lay by.

ASSISTANT: May, I know your good name?

USER: I am Gary Brown.

ASSISTANT: Sorry, we found no flights on your given dates.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us.