You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Mark Wilson here. I was made a wrong reservation earlier in this week. So I want to change my reservation. Can you please help me for that?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok, take your time.

ASSISTANT: No reservation is found on your name. Sorry for inconvenience.

USER: Thank you for the information.

ASSISTANT: You are welcome.