You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I need to amend my reservation as I am not able to make my trip. Can you help me out about that?

ASSISTANT: Sure,  I am mirthful to help you with that.

USER: Thank you.

ASSISTANT: Can you please let me know your name for further process?

USER: Yes, I am Ryan Lopez.

ASSISTANT: Please wait for a while, let me check your previous reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. There is no reservation found on your name in our reservation list to change.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Most welcome, thank you for reaching us. Have a great day.