Hello.
Hello. How may I help you?
I am Melissa Green. I want to change an existing reservation.Can you help me?
Sure Melissa,wait for a moment to check it?
OK.
Thank you for waiting. sorry, that I could found a reservation on requested name .
May I know my flight details?
Sorry, there is no reservation found Melissa.
OK, thank you.
Thank you . Have a good day.