Hello.
user
Hello. How may I assist you?
assistant
I need to change my reservation as my plan to go for trekking got postponed. Can you help me?
user
Sure, I am here to help you out. May I know your name please?
assistant
I am Helen Green.
user
 Helen Green, we haven't found any reservation under your name in our database.
assistant
That's Ok, thanks for your response.
user
Thank you for reaching us.
assistant