You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I would like to change my recent reservation, will you help me with that?

ASSISTANT: Sure, I am glad to assist you. May I know your good name please?

USER: Thank you for accepting my request. Myself Robert Hall.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: Sorry to inform you that, there is no reservation found as per your name in our database.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.