You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I would like to amend an existing reservation due to an emergency, can you please help me?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Virginia Miller here.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, there is no reservation found on your name to change.

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

ASSISTANT: Thank you for contacting us, hope to serve you again.