You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Samantha Taylor.

ASSISTANT: How can I assist you today?

USER:  I already have an reservation to attend a meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation. Can you please change my existing reservation?

ASSISTANT: Sure, please hold on I will search your name in our database and revert to you.

USER: Sure, I will wait.

ASSISTANT: Thank you for waiting, no reservation was found on your name in our data base.

USER: Ok, no worries.

ASSISTANT: Thank you for opting us.

USER: Thanks for your response.