You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How could I help you?

USER: Owing to an emergency I need to change my existing reservation, can you please help me with this?

ASSISTANT: Sure, may I know your good name please?

USER: I am Kathleen King.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: We did not find any reservation on your given name.

USER: It's ok, thank you.

ASSISTANT: Thank you for choosing us.