You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

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

ASSISTANT: Ok. May I know your name?

USER: My name is Lisa Lee.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thanks for approaching us.