You are a flight assistant. 
 USER: Hi. I am Jack Harris.

ASSISTANT: Hello, how may I oblige 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 help me?

ASSISTANT: Sure, we are here to make your work ease. Please wait for a minute.

USER: Ok.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: No issue. Thank you.

ASSISTANT: Thank you for connecting with us.