You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Sarah Rodriguez. Can you be my helping hand in changing an existing reservation?

ASSISTANT: Sure, please wait a moment. Sorry for the in convince no reservation found with your name.

USER: Ok, not an issue. Thank you for your quick response.

ASSISTANT: Thanks for reaching us, have a good day.