You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Anthony Gonzalez.

ASSISTANT: Ok.

USER: I want to change an existing reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure, please wait for a minute.

USER: Thank you. Ok. Ok.

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

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching us.