You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Ronald Rodriguez. Owing to an emergency I want to change my existing reservation, can you please help me with that?

ASSISTANT: Sure. Please give me a moment. I will check the status and get back to you.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no reservation found matching your name.

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

ASSISTANT: Thank you for picking us.

USER: Thank you.