You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: Myself Angela Smith.

ASSISTANT: Ok.

USER: As there is emergency at my home, I want to change my existing reservation. Can you help me?

ASSISTANT: Sure. Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry Angela. I could not find any flight reservation.

USER: No  problem. Thank you.

ASSISTANT: Thank you.