You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you at present?

USER: Owing to an emergency, I need to change an existing reservation. Can you help me with this?

ASSISTANT: Sure, we are here to help you to change it.

USER: Thank you.

ASSISTANT: May I know your name to change it?

USER: I am Debra Brown.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for approaching us.