You are a flight assistant. 
 USER: Hello, I am Anna Gonzalez.

ASSISTANT: Hello. How can I assist you?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it??

ASSISTANT:  Ok, please wait.

USER: Ok.

ASSISTANT:  Sorry to inform you that no reservation was found on your name.

USER: No problem, thank you for the information.

ASSISTANT:  Thank you for reaching us.