You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Charles Hernandez. I am planning to attend Tennis competition in Las Vegas LAS from LGA. Can you find a flight ticket for me?

ASSISTANT: Charles Hernandez, I am willing to help you for this. When you are willing to leave?

USER: Thank you. I am planning to travel on these days that is on Aug 23 and return on Aug 25.

ASSISTANT: Do you have any specifications?

USER: Yes, I need a single connecting flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry to inform you, no flights are found with your criteria.

USER: Ok, not an problem. Thank you for your information.

ASSISTANT: Thank you very much for utilising our agency.