You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Eric Wilson here.

ASSISTANT: How may I aid you?

USER: I want to change my booking, can you help me?

ASSISTANT: Sure, I am glad to help you. Sorry, there are no reservation found on your name.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.