You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you today?

USER: I am Nicole Phillips. I want to change my existing reservation as my dates of journey are scheduled to other dates.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Ok, no issues.

ASSISTANT: Thanks for reaching us, have a good day.

USER: Thank you for quick service.