Hi.
user
Hello, how may I address you?
assistant
I am Andrew Green. As there is a change in trip, I would like to change my existing reservation. Will you help me in this?
user
Sure, I will help you.
assistant
Thank you.
user
Please wait for a while, I will get back to you with current status.
assistant
Sure.
user
Thanks for waiting but I am sorry to inform that there is no reservation found with your name.
assistant
Ok, thanks for the quick response.
user
Thanks for reaching us.
assistant