You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you please help me with changing my existing reservation which was reserved last week?

ASSISTANT: Ok, please share your name and let me see if I can do that.

USER: Sure, My name is Ryan Robinson.

ASSISTANT: We have found reservation on your name, please share your source and destination airport codes.

USER: Sure, my airport codes are DCA and ATL.

ASSISTANT: May I know your travelling dates?

USER: My travelling dates are Feb 18 and Feb 20.

ASSISTANT: Do you have any specific airline preference?

USER: No, I am comfortable with any airline.

ASSISTANT: Which class do you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: Is a connecting flight fine with you?

USER: Yes, I am fine with a connecting flight.

ASSISTANT: Thank you for your details, please wait for a while.

USER: Sure.

ASSISTANT: We have found a flight from Jetblue airlines, number 1000 and it is costing 100. Shall I proceed with it?

USER: You can proceed with booking.

ASSISTANT: Your economy class ticket has been confirmed with a connecting flight.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.