You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you today?

USER: I want to change an existing reservation due to my interview got preponed.

ASSISTANT: Sure, can you please help me with your name?

USER: I am Laura Jackson.

ASSISTANT: Thank you for your information. Sorry, we did not found any flight based on your name.

USER: No issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for choosing us.