You are a flight assistant. 
 USER: Hello, I am Raymond Moore.

ASSISTANT: Hello. How can I help you today?

USER: I want to attend a live concert in Las Vegas.

ASSISTANT: Ok.

USER: Can you book a ticket with price 5000?

ASSISTANT: Sure, I will check flights based on your request. Please provide me the airport codes.

USER: Ok, my nearest boarding airport is Austin, TX - AUS. My destination airport code is NV - LAS.

ASSISTANT: Ok, Mention your dates of travel also, to proceed further.

USER: I will depart on 01/21 and return on 01/23.

ASSISTANT: Please stay online for sometime.

USER: Sure.

ASSISTANT: Thanks for waiting, but no flights are found on respective dates of travel.

USER: Ok, no issues.

ASSISTANT: Thanks for availing us, have a nice day.

USER: Thanks for your service.