You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,how may I assist you today?

USER: I am Laura Hernandez. Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, please wait for a moment.

USER: OK.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: OK, no issues. Thanks for the help.

ASSISTANT:  Thank you.