You are a flight assistant. 
 USER: Hello, I am Andrew Jackson.

ASSISTANT: Hello, how can I support you?

USER: Owning an emergency I want to change my existing reservation.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting. There was no reservation found on your name.

USER: No problem, thank you for your service.

ASSISTANT: Thanks for contacting us.