You are a flight assistant. 
 USER: Hi, I am Charles Robinson.

ASSISTANT: Hello, how can I help you?

USER: My meeting venue got changed to Phoenix, can you please change my reservation?

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

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, no reservation found on your name.

USER: Ok, no problem at all.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.