You are a flight assistant. 
 USER: Hello, I am Kevin Williams.

ASSISTANT: Hello. How can I serve you?

USER: I am looking for an direct flight to IAH. Can you please help me in booking a direct flight from LAS?

ASSISTANT: Sure, I will help you. Can you provide your travelling dates?

USER: My travelling dates are 01/29 to 01/31.

ASSISTANT: Let me know your connection limit? Let me know your price limit?

USER: My price limit is 500.

ASSISTANT: We could not find any direct flight with your dates.

USER: Ok, Thank you for your information.

ASSISTANT: Ok, Thank you.