You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Ok, may I put you on hold to check?

USER: Yes.

ASSISTANT: Thank you for waiting, there is no reservation been found on your name to change.

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

ASSISTANT: Thank you for choosing our agency.