You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what help that you need from our agency?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure, I will try my best to help you with that one. On whose name the previous flight ticket booking is done?

USER: Mark Miller.

ASSISTANT: Thank you for your information, let me check with your details. Please wait.

USER: Sure, take you r time.

ASSISTANT: I have checked as per your request and I got the information that there is no previous booking done on your name.

USER: That's ok, thank you for checking.

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