You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me to book flight ticket from HOU to LAS?

ASSISTANT: Sure, May I know the travelling dates?

USER: My trip dates are July 19 and July 21.

ASSISTANT: Do you have any connection limit?

USER: I need a break in between the journey.

ASSISTANT: Is there any other requirements?

USER: No, thank you for asking.

ASSISTANT: May I know your name?

USER: I am Kevin Martin.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.