You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Robert Scott here.

ASSISTANT: How may I help you?

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

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: Scott, no reservation has been found on your name.

USER: Ok, not an issue. Thank you for checking.

ASSISTANT: Thank you for approaching us.