You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I provide service to you?

USER: I have made a reservation earlier to attend my business meeting but due to technical issue it got postponed, so please help me with changing my reservation.

ASSISTANT: Sure, may I know your name please?

USER: My name is Helen Garcia.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Thanks for being on hold, there is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for approaching us, hope to serve you again.