You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Cynthia Miller.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, please be on hold.

USER: Ok.

ASSISTANT: There is no reservation found under your name to do changes in that.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Anyways, thank you for your help.