You are a flight assistant. 
 USER: Hello,. I am Lisa Davis.

ASSISTANT: Hello, how can I serve you today?

USER: I want to book a flight ticket to meet my uncle in Las Vegas, will you help me in booking a flight ticket with a price limit of 5000?

ASSISTANT: Sure, please mention your planned journey dates?

USER: I want to travel on 01/09, and need to catch return flight on 01/11.

ASSISTANT: Do you want any connection in between your journey?

USER: Yes, I need a connection.

ASSISTANT: Please provide me your airport codes?

USER:  I need to leave from my nearest airport LGA to reach LAS.

ASSISTANT: Please wait for a moment, while I check for flight.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your journey data.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for visiting us, we hope see you again.