Hello, I am Deborah Lee.
Hello, how may I aid you?
I  need to change my existing reservation as my appointment with my lawyer got postponed. Can you help me with it?
Sure, let me check the status and get back to you.
Ok.
We found a reservation on your name. May I know your updated dates to change your reservation?
My planned dates of travel are 05/16 and 05/18.
Kindly share your airport codes.
They are from ORD to IAH.
Thanks for your details. There are no flights available at this moment on your required dates.
That's ok, thank you for your response.
Thank you for choosing us.