You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me to change my active reservation as my meeting was changed?

ASSISTANT: May I know your good name?

USER: Thomas Campbell.

ASSISTANT: Ok, please wait for a while.

USER: Ok, I will wait.

ASSISTANT: Thanks for waiting, I have gone through the reservation list twice but could not find any reservation active under your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome Thomas Campbell.