You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: Ok, may I know your name to check the reservation status?

USER: My name is Richard Roberts.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Thank you.

ASSISTANT: Thank you for reaching us.