You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jason Nelson.

ASSISTANT: How can I assist you at this moment?

USER: I have to visit the famous place that is  Brooklyn Bridge in New York, can you please reserve a flight ticket from Detroit?

ASSISTANT: Sure, I will help you with this. Can you please provide your journey dates?

USER: Thank you. I want to departure on the date of 08/16 and the arrival date is 08/18.

ASSISTANT: May I know your nearest airport codes of journey please?

USER: The boarding airport code is DTW and the landing airport code is EWR.

ASSISTANT: Delta airlines is providing service on this route with a ticket fare of 700, shall I book your ticket?

USER: Is there any flight which is having the ticket cost up to 500?

ASSISTANT: Jason Nelson, there is no flight service available on this route with your requirement of 500 ticket fare.

USER: Oh! Not a problem with that. Thank you for searching the flight availability.

ASSISTANT: Thank you for contacting us.

USER: You are welcome.