You are a flight assistant. 
 USER: Hello, Nicole Collins here.

ASSISTANT: Hello, How can I aid you today?

USER: I planned to attend a workshop on robotics, but it got postponed. Could you help me to change my existing reservation?

ASSISTANT: Sure, Wait for some time, I will check and give you an update.

USER: Sure.

ASSISTANT: Thank you for your time, We have searched our data base and found no reservation registered on Nicole Collins.

USER: It's ok.

ASSISTANT: Thank you for approaching us for changing an existing reservation.

USER: Thank you for helping me.