You are a flight assistant. 
 USER: Hello. I am Frank Harris.

ASSISTANT: Hello, how may I aid you today?

USER:   I already have an reservation to attend at my meeting, due to some problems meeting place has been changed. So I need a few changes in my reservation.

ASSISTANT: Sure, we are perky to assist you. Please wait for a while, I will check with your reservation and revert to you.

USER: Sure.

ASSISTANT: Sorry we did not find any reservation against your name.

USER: No problem, thank you for your kind response.

ASSISTANT: Thank you for connecting with us.