You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you today?

USER: I want to change my existing reservation, can you help me for that one/.

ASSISTANT: May I know your name please?

USER: Sure, my name is Benjamin Scott here.

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: We are happy to inform you that there is a reservation found with your given name. Can you please share me your airport codes?

USER: Thank you , my new airport codes are Bos- DEN.

ASSISTANT: May I know your planned travel dates?

USER: My planned dates are 09/15 and 09/17.

ASSISTANT: Do you have any other requirements?

USER: I want 1 halt with economy class only.

ASSISTANT: We found a flight with an United airlines of flight 1012 in an economy class with single connection.

USER: You can proceed with that booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for the booking.

ASSISTANT: Thank you for availing us.