You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Rodriguez.

ASSISTANT: How can I assist you today?

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

ASSISTANT: Please give me a moment.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, there is no reservation found under your name.

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Welcome, have a great day.