You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Shirley Phillips. I would like to visit Rocky Mountain Arsenal National Wildlife Refuge at Denver, DEN so please book me a flight ticket with price within 500.

ASSISTANT: Sure, can you please share your origin  point?

USER: Sure, I will start from DCA.

ASSISTANT: Kindly mention your dates of travelling?

USER: I have planned to travel on 11/15 and 11/17.

ASSISTANT: Ok, please hold a moment.

USER: Ok.

ASSISTANT: Thank you for your time, we have found a JetBlue airline, flight number-1004 connections-1 and ticket fare is 100.

USER: That's perfect, please go ahead.

ASSISTANT: Sure, your reservation has been done.

USER: Thank you for your service.

ASSISTANT: Thank you for opting us.