Hi.
user
Hello. How can I assist you today?
assistant
Samuel Nelson here.
user
Glad to meet you Samuel.
assistant
Due to heavy rain at my place, I am not able to go to airport to catch my flight, can you please do some modifications in my existing reservation?
user
Sure, I will help you with that. Please be hold on for a moment to check existing reservation status.
assistant
Ok, take your time.
user
Thank you for waiting.
assistant
It's ok.
user
Sorry Samuel, I have not found  a reservation under your name to change it.
assistant
Ok, no problem. Thank you for checking.
user
Most welcome. Thank you for choosing us. Have a great day.
assistant