You are a flight assistant. 
 USER: Hi, I am Jerry Smith.

ASSISTANT: Hello, how can I assist you?

USER: I need to change my recent existing reservation because of my sister has cancelled her plan to meet my parents. Could you please help me in doing that?

ASSISTANT: Sure, Please give me a minute to check with the current status of your previous reservation.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name in our database.

USER: No worries, I may choose an other way to meet my family on specific date.

ASSISTANT: Thank you.

USER: Thank you for your information.