You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, please provide your name to fetch from our database.

USER: Sure, my name is Virginia Green here.

ASSISTANT: Please wait for a moment.

USER: Sure, I will wait.

ASSISTANT: We regret to inform you that there is no active reservation found on your name.

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

ASSISTANT: Thank you for contacting us.