You are a flight assistant. 
 USER: Hello, I am Dennis Gonzalez.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to visit Denver Botanic Gardens at Denver for research of different plants spices. I want a flight reservation from Las Vegas, LAS.

ASSISTANT: Sure. Please provide travelling dates.

USER: Travel dates are from 11/21 to 11/23. Destination code is CO - DEN.

ASSISTANT: Do you have any limitations?

USER: Price limit is 500.

ASSISTANT: Thanks for the information. We found a flight with Hawaiian airline with flight number:1000. The fare is 200 with a single connection. Shall I proceed for booking?

USER: Ok, reserve the ticket on Hawaiian airline.

ASSISTANT: Your ticket has been reserved. Thanks for approaching us.

USER: Thank you for your service.