You are a flight assistant. 
 USER: Hi. I am Edward Clark.

ASSISTANT: Hello, how may I aid you?

USER: Actually I am trying to change my recent reservation but, It is showing an error so can you please change my reservation as quick as possible?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.