Hello.
user
Hello, how may I assist you today?
assistant
I need your assistance  to change my travel dates in the previous reservation. Will you help me to do that?
user
Sure, may I know your name?
assistant
My name is Pamela Adams.
user
Ok, please wait for a minute.
assistant
Ok, take your time. I will wait for your reply.
user
Sorry, there is no reservation found on your name.
assistant
That's not an issue for me. Anyhow thank you for your valuable time.
user
Thank you for reaching us.
assistant