Hello.
user
Hello. How can I help you today?
assistant
I need to change my existing reservation, because my business trip is postponed. So will you alter my reservation?
user
Sure, I will help you with this.
assistant
Thank you.
user
Can you please provide your name to check the reservation status in our database?
assistant
I have booked my ticket with name Brenda Martinez.  So go ahead and check with this name.
user
Please wait a moment.
assistant
Ok.
user
Brenda Martinez, there is no reservation found with your name in our database.
assistant
It's ok, thank you.
user
Thank you for contacting us.
assistant
You are welcome.
user