You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am unable to modify my reservation, can you help me to modify?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Andrew Wright is my name.

ASSISTANT: Ok, please wait for a while.

USER: OK.

ASSISTANT: Sorry we could not find any reservation with your name.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank  you for reaching us.