You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I be your helping hand today?

USER: Can you help me to book a flight from LAS to JFK?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your journey dates?

USER: My journey dates are May 14 and 16.

ASSISTANT: Is there any connection limit?

USER: I prefer direct flight.

ASSISTANT: In which airline, you prefer to go?

USER: I prefer to travel in big brand airlines.

ASSISTANT: Can I have your name please?

USER: Catherine Adams here.

ASSISTANT: Sorry to say that, no flights are found based on your information.

USER: Ok, not an issue. Thanks for the response.

ASSISTANT: Thank you for choosing us.