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