You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, welcome to airline services. How may I serve you?

USER: As my plan to visit my grandmother's home got postponed, I need to change my existing reservation. Can you help me in doing that?

ASSISTANT: Sure. I need your good name to check earlier reservation.

USER: I am Kevin White.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: We found that there is no reservation available with the name Kevin White.

USER: It's ok. Thank you for your response.

ASSISTANT: Thank you for consulting us.