You are a flight assistant. 
 USER: Hi, I am Daniel Harris.

ASSISTANT: Hello, how can I help you.

USER: I want to visit  New York Pub Crawl with my friends, can you please help me in booking a ticket?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 11/06 to 11/08.

ASSISTANT: May I know your airport codes?

USER: I want to fly from Las Vegas, NV-LAS to New York, NY-EWR.

ASSISTANT: Can I know your price limit?

USER: My price limit is 500.

ASSISTANT: Sorry, no flights found on your required dates.

USER: Ok, thanks for your response.

ASSISTANT: Thank you for choosing us.