You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please change my recent reservation to new one?

ASSISTANT: Sure, we are glad to help you. Please let me know your good name.

USER: Jennifer Garcia here.

ASSISTANT: Sorry, there is no active reservation on your name in our records.

USER: That's ok, thank you for your service.

ASSISTANT: Thank you for choosing us.