You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: Myself Laura White.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT: For proceeding further. May I know your name please?

USER: I have already mentioned.

ASSISTANT: Sorry to inform you, no reservation is found with your credentials.

USER: Ok, not an issue.

ASSISTANT: Thank you very much for approaching our agency.

USER: Thank you for your information.

ASSISTANT: You are most welcome.