You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: As my plan for holiday trip was postponed, I want your help in changing an existing reservation.

ASSISTANT: Sure. May I know your name for checking in reservation?

USER: My name is Jennifer Jackson.

ASSISTANT: Ok, Please standby.

USER: Ok.

ASSISTANT: Thanks for waiting, Unfortunately, there is no reservation found with your name. Thank you for availing us.

USER: Thanks for the information.