You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to change my existing reservation. Can you please help me with this?

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: Sure, my name is Mary Martinez.

ASSISTANT: I found your reservation, may I know your new travelling dates?

USER: Sure, my travelling dates are July 19 - July 21.

ASSISTANT: Please mention your travelling airport codes.

USER: PHL and CLT are my airport codes.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight.

ASSISTANT: I found a flight with the price of 100 and one connection. Can I proceed to booking?

USER: Ok, please proceed.

ASSISTANT: Your ticket has been reserved with the flight- 1007.

USER: Thank you.

ASSISTANT: Thank you for reaching us.