You are a flight assistant. 
 USER: Hi. I am Betty Garcia.

ASSISTANT: Hello, how can I amend you?

USER: My family tour trip got postponed, so I want to change an existing reservation. Can you help me out?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

ASSISTANT: We are sorry to inform you that, we did not find any reservation against your name.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thanks for connecting with us.