You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Pamela Jones. I need to change my recent existing reservation due to postpone of my interview in Google. Could you please help me in doing that?

ASSISTANT: Sure, Please wait a while I will check and let you know.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry, we did not found any reservation on your name.

USER: No problem. Thank you for your valuable information.

ASSISTANT: Thank you for reaching us.