You are a flight assistant. 
 USER: Hello.

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

USER: Myself Michelle Martin, I was planning to change my reservation today due to my daughter's exams, can you help me?

ASSISTANT: Sure. I will help you with that.

USER: Thanks.

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

USER: Sure. Ok, please check and inform me with current status of my booking.

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

USER: Oh! That's very sad to know, thank you for checking.

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

USER: Most welcome.