You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Donna Baker.

ASSISTANT: What service that you are looking from our agency?

USER: I would like to cancel my recent reservation due to some personal issues, will you help me with that?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait a moment to check your previous reservation.

USER: Ok, take your own time.

ASSISTANT: We regret to inform you that, there is no reservation on your name in our records.

USER: Ok, not an issue. I will find an other alternate to cancel my reservation. Thank you for your information.

ASSISTANT: It's alright. Thank you for reaching us, hope you have a great day.