You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my current reservation due to sudden change in my trip. Can you please assist me?

ASSISTANT: Sure, may I know your name?

USER: Linda Rodriguez here.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: No problem, thank you for searching.

ASSISTANT: Thank you for choosing us.