You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Timothy Wright here.

ASSISTANT: Yes Wright.

USER: There is huge rains at my visiting place, so I would like to change my reservation.

ASSISTANT: Ok, I will help you. Sorry, I did not find any reservation in your name to do modifications.

USER: That's ok. Thank you for your help.

ASSISTANT: Anything else to help you.

USER: No, thanks.

ASSISTANT: Thank you for reaching us. Have a great day.