You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, please let me know your name to find your current reservation.

USER: Myself Eric Thomas.

ASSISTANT: Can you please stay connected for a while?

USER: Sure.

ASSISTANT: I am sorry to inform you that we didn't find any reservation on your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.