You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Nicholas Williams.

ASSISTANT: Glad to meet you Williams. What kind of service do you need from our agency?

USER: I would like to visit Millennium Park, it is a public park located in the Loop community area at Chicago. Will you help me in booking the flight ticket?

ASSISTANT: Sure, we are here to provide you the best from our agency.

USER: Thank you.

ASSISTANT: May I know your respective airport codes?

USER: I would like to start my journey at Orlando and the airport code is MCO.

ASSISTANT: Ok, can you please share your destination code?

USER: My destination airport code is ORD.

ASSISTANT: Ok, could you please provide your departure and arrival dates of your trip?

USER: I planned my journey on 07/30 and return on 08/01.

ASSISTANT: Ok. please hold on, let me check the best flight availability for you in this route.

USER: Sure, take your time and let me know the flight availability status on my requested route.

ASSISTANT: UA airlines are having a connecting flight with a fare of 700. Would you like me to book that flight for you?

USER: My estimated fare is 200, can you please recheck once?

ASSISTANT: Sure, wait for a while let check out with that.

USER: Ok, I wait for your response.

ASSISTANT: Sorry for the inconvenience, there is no flight based on your requirements.

USER: Ok, not an issue. I will check with any other alternate to book my ticket.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Welcome and thank you for contacting us, have a gleeful day.