Hello. Dorothy Turner is here.
Hello, how may I assist you today?
I have to reschedule my journey dates to go for a trip to Detroit. For this  I need your help to change the reservation.
Sure, we are here to help you.
Ok.
Please wait a moment, let me check your reservation and let you know.
Sure, I will wait.
Thank you for your valuable time, sorry, no reservation found with provided name.
Fine, thank you for your information.
Thank you for availing us.