You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Emily Walker here. I want to change my existing reservation due to family function. Can you help me in this one?

ASSISTANT: Sure, please wait while I fetch your current reservation details.

USER: Sure.

ASSISTANT: Sorry no reservation found on your name to change.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for connecting us.