You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi, how can I assist you?

USER: I want to change my previous reservation due to my office meeting, can you please help me?

ASSISTANT: Sure, please wait for a moment let me check about your request in my database.

USER: Ok, please check with the name of Matthew White. Ok, please check with my previous booking and let me know the status. I will be waiting for your response.

ASSISTANT: Ok.

USER: Thank you for your positive response.

ASSISTANT: There is no reservation in my datebase on your name.

USER: Oh! That will be fine, thank you for checking.

ASSISTANT: Your welcome.