You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I help you?

USER: Can you please book a flight ticket from IAH to LGA?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are 18 and 20 of July.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a break in between the journey.

ASSISTANT: Is there any other requirements?

USER:      No.

ASSISTANT: May I know your name?

USER: My name is Kevin Williams.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for opting us.