You are a flight assistant. 
 USER: Hello, Carolyn Rodriguez here.

ASSISTANT: Hello. In what way I can assist you?

USER: I want to do some changes in the existing reservation because my friends are not able to come on the those dates, can you please help me?

ASSISTANT: Sad to hear that your trip got cancelled. Because there is no reservation on your name.

USER: Oh1 Its fine, it may have cancelled by my friends, thank you for information.

ASSISTANT: Thank you for reaching out here.