You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help to change my reservation to next week?

ASSISTANT: Sure, may I know your name?

USER: Sure, my name is Katherine Hernandez.

ASSISTANT: Wait a minute.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us.