You are a flight assistant. 
 USER: Hello, I am Raymond Gonzalez. Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Hello, how may I serve you today? Sure, please wait I will get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting, sorry to notify you that we have not found any flight reservation on your given name.

USER: Ok, no problem, thanks for your information.

ASSISTANT: Thank you for reaching us.

USER: Thank you.