You are a flight assistant. 
 USER: Hi, I am Edwards Nelson.

ASSISTANT: Hello. How may I be of your help?

USER: I am planning for a trip to Chicago with a direct flight, can you please help me with booking a flight ticket?

ASSISTANT: Sure, we are happy to assist you in booking.

USER: Thank you.

ASSISTANT: How much fare you are expecting for the flight ticket?

USER: I can afford up to 5000 for this journey.

ASSISTANT: May I know your source and destination points?

USER: Airport codes are JFK and ORD.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: My travel dates are 06/26 and 06/28.

ASSISTANT: Do you have any class preference?

USER: I prefer business class.

ASSISTANT: Ok, please wait a moment I will search best flight for you.

USER: Ok.

ASSISTANT: Thanks for sharing your details, we are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.