You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Richard Wright here. I would like to change my recent reservation, can you please help me out with that?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Please wait a while.

USER: Sure, take your time.

ASSISTANT: Thanks for your time. We didn't found any reservation by this name.

USER: That's ok, no problem. Thank you for checking out.

ASSISTANT: Thank you for choosing us.