You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I amend you today?

USER: Owing an emergence, I want to change my existing reservation.

ASSISTANT: Ok.

USER: Can you please help me with it?

ASSISTANT: Sure, we are here to help you. Let me know your name.

USER: My name is Dorothy Williams.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for the help.