You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Timothy Williams.

ASSISTANT: How can I aid you?

USER: I want to change my reservation as my meeting venue got postponed, can you please help me out?

ASSISTANT: Sure, I am here to help you with that.

USER: Thank you.

ASSISTANT: Please, wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.