You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I amend you?

USER: On my name John Thomas reserve a seat to Las Vegas, LAS to participate in jewellery expo.

ASSISTANT: Sure, may I know at what price you are looking for airfare?

USER: 500 is the budget for my ticket.

ASSISTANT: Can you please share your journey dates?

USER: 11/18 - 11/20 are my scheduled dates of travel.

ASSISTANT: May I know your heading and landing points?

USER: Minneapolis, MSP is my boarding point.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thank you for your patience. You have no flights to travel on your particular days of journey.

USER: Ok, no issues. Thank you for quick service.

ASSISTANT: Thank you for availing us. Have a good day.