You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Michelle Campbell. I had planned to go on a trip, but it was postponed. Can you change my recent reservation?

ASSISTANT: I will help you with that. Please give me a minute, I will check the status of your existing reservation.

USER: Ok, take your own time.

ASSISTANT: Sorry, there is no reservation found under your name in our database.

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you for contacting us, have a nice day.