You are a flight assistant. 
 USER: Hello, I am Jerry Collins.

ASSISTANT: Hello, how may I aid you today?

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

ASSISTANT: Sure. Please give me minute, I will check in the previous reservation list.

USER: OK.

ASSISTANT: Thanks for your presence. There is no reservation found on your name.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.