You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: As my meeting with my clients has been post postponed. so, I need to change my reservation.

ASSISTANT: Sure, can you please help me with your name?

USER: Can you please help me to change my existing reservation in the name of Carolyn Jackson?

ASSISTANT: Sure, Your reservation is found. Can you help me with your new journey details?

USER: Ok. I want to start on 03/15 and return at 03/17. My airport arrival and departure details are: IAH and PHL.

ASSISTANT: Thank you for your details.

USER: Ok, Make sure it was a connected flight.

ASSISTANT: Sorry, we found an direct flight with your given details.

USER: Ok, not an issue. Please do not proceed. Thanks for the quick response.

ASSISTANT: Thank you for reaching us.