You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I need to change my active reservation, can you please help me out?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for your kind reply.

ASSISTANT: May I know your good name?

USER: Myself Matthew Jackson.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, I found your reservation in our system data. Please share me your airport codes?

USER: My travelling airport codes are LAS and JFK.

ASSISTANT: Please mention your planned journey dates?

USER: My new travelling dates are July,29 and July,31.

ASSISTANT: May I know your airline preference?

USER: I need a normal-cost airlines.

ASSISTANT: Do you want any connection in between your flight journey?

USER: Yes I need a connecting flight for my journey.

ASSISTANT: Do you have any other requirement?

USER: My return time should be in the evening and I need a travel in business class.

ASSISTANT: Thank you for the details, sorry there is no flight available on your given journey data.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us, we hope see you again.