You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Could you please book me a plane ticket from JFK to HOU?

ASSISTANT: Sure, May I know the travelling dates?

USER: I will start on Jan 12 and return on Jan 14.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 lay by within my route.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Christine Brown.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

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

ASSISTANT: Thank you for opting us.