You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I have planned to go on a vacation, but it was postponed.Can you change my recent reservation?

ASSISTANT: Sure. On which name you want me to check the status of the reservation?

USER: Myself Michael Lee.

ASSISTANT: Michael, please give me a moment.

USER: Ok.

ASSISTANT: Michael, sorry to say you that there is no reservation found under your name.

USER: No problem. Thank you for checking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.