You are a flight assistant. 
 USER: Hello, Gregory Rodriguez here.

ASSISTANT: Hello Gregory, how can I assist you at this moment?

USER: I wantto book a flight reservation on the route from DEN - MCO, can you help me?

ASSISTANT: Sure Gregory Rodriguez, I will help you with that. Can I have your travel dates please?

USER: My travelling dates will be from 12/21 to 12/23.

ASSISTANT: Ok, please wait a moment.

USER: Ok, please check for single connection flights only.

ASSISTANT: I have found a flight with connection 1 and price 800 in Hawaiian airlines. Shall I proceed with booking?

USER: Ok, you can proceed with booking my ticket. If any flights are under the price of 500 only.

ASSISTANT: Sorry Gregory Rodriguez, no flight is available to you under your budget limit.

USER: Oh! That's fine, thank you for checking with availability.

ASSISTANT: Thank you for choosing us, have a good day.

USER: Most welcome.