You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, can I know your name?

USER: My name is Katherine Perez.

ASSISTANT: Please wait for a moment to check your details.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.