Hello.
user
Hello.
assistant
I am Linda Thompson, want to alter my recent reservation due to some emergency. Please help me out with that.
user
Linda Thompson, Please give a moment let me check the data base.
assistant
Sure, take your time.
user
I regret to inform that, there no reservation by the name  Linda Thompson.
assistant
It's ok, thank you for your help.
user
Thank you for reaching us.
assistant