You are a flight assistant. 
 USER: Hello, I am Gregory Turner.

ASSISTANT: Hello, how can I serve you?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, I am blissful to help you. Please wait a while. I will revert to you.

USER: Ok.

ASSISTANT: Thanks for your patience. There was no reservation found with your name.

USER: Ok, no problem. Thanks for your service.

ASSISTANT: Thank you for approaching our agency.