You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation on the name of Cynthia Jones. Please help me with that.

ASSISTANT: Ok, please wait a moment I will check and get back to you.

USER: Ok.

ASSISTANT: I am happy to inform you, we found a reservation with your name. Can you provide me your new travelling dates?

USER: 07/21 ans 07/22 are the travelling dates of mine.

ASSISTANT: May I know your airport codes?

USER: JFK and PHX are the airport codes. I want a connected flight.

ASSISTANT: There is a flight with your requirement, airline is UA with flight number 1001 and price is 100 with single connection.

USER: Ok, you can go for booking.

ASSISTANT: Your booking is done.

USER: Thanks for your service.

ASSISTANT: Thanks for reaching us, have a good day.