You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: I want to change my existing reservation owing to an emergency.

ASSISTANT: Sure, will you please let me know your name?

USER: My name is Dorothy Garcia.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found active under your name in our data base.

USER: Thanks.

ASSISTANT: Thank you for choosing us.