Hello. Myself Barbara Carter here.
Hello, how may I assist you today?
As my Manager didn't approve my leave I want to change my reservation. Can you help me with it?
Sure, I am here to help you.
Thank you.
Please wait for some time.
 Ok.
Thanks for waiting. Sorry, there is no reservation found on your name.
Ok, no issues. Thank you for your response.
Thank you for reaching us.