You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: Can you help me to change my active reservation as my meeting was changed?

ASSISTANT: Sure, we are here to assist you. On whose name, the reservation has been made earlier?

USER: Myself Nancy Walker.

ASSISTANT: Please stand by.

USER: Ok.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.