You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to cancel my reservation due to my exams, can you please help me with it?

ASSISTANT: Yes, I am here to help you with our services.

USER: Thank you.

ASSISTANT: Can I know your name to proceed with checking my reservation?

USER: Sure, my name is Elizabeth King.

ASSISTANT: Ok, please wait till I check with your existing reservation.

USER: Sure, take your time.

ASSISTANT: Elizabeth King, I could not find any reservation by your name in our data base.

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

ASSISTANT: Thank you for reaching our assistance.

USER: Thank you for helping me out.

ASSISTANT: Have a nice day.

USER: Most welcome.