You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I abet you today?

USER: Owing to an emergency, I need to change my existing reservation.

ASSISTANT: Sure, we will help you . Let me know your name for further checking.

USER: Matthew Wright is my name.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found on your name in our reservation list.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us, have a nice day.