You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, may I know your name to check the current status and revert you?

USER: My name is Barbara Miller.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We could not find any reservation by the name you provided.

USER: Thanks.