You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I aid you?

USER: I am Emma Perez.

ASSISTANT: Ok.

USER: As my business meeting has been postponed, Can you please change my reservation?

ASSISTANT: Sure, please standby.

USER: Sure.

ASSISTANT: Thanks for your time, no reservation exists in your name.

USER: No problem. Thank you.

ASSISTANT: Thanks for approaching us. Have a great day.