You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My interview has been postponed, I want to change my reservation. Can you please change my reservation?

ASSISTANT: Ok, may I know your name?

USER: Sure, I am Thomas Adams.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: Ok, Thank you for your help.

ASSISTANT: Thank you for reaching us.