You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: I need to change my recent reservation due to some issues, can you help me in doing that?

ASSISTANT: Sure, I will help you with that. May I know your good name?

USER: I am Patrick Brown.

ASSISTANT: Please give me a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for being patient, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for availing us.