You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Amanda Mitchell.

ASSISTANT: How are you doing Amanda?

USER: I had planned to go on a vacation, but it was postponed.Can you change my recent reservation?

ASSISTANT: Sure, please wait for a while.

USER: I am doing good. Sure.

ASSISTANT: Sorry, there is no previous reservation found on your name to change.

USER: That's ok. Thank you for the information.

ASSISTANT: You are welcome. Have a great day.