You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you at this moment?

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

ASSISTANT: Sure, may I know your good name please?

USER: Thomas Martin.

ASSISTANT: Ok, please wait for few minutes.

USER: Ok, I will wait.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.