Hello.
user
 Hello, how may I oblige you today?
assistant
I am Helen Lewis. I want to change my travel dates in my previous reservation so can you please help me with that?
user
Sure, please wait.
assistant
Ok, thank you for your response.
user
We hardly tried to find your reservation but, no reservation has been found with your name.
assistant
Oh! It's ok no problem. Thank you for your information.
user
Thank you.
assistant