You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: Myself George Campbell. I want to change my existing reservation, can you help me in that?

ASSISTANT: Ok, please wait.

USER: Sure, I will wait for your response.

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

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: You are welcome.