You are a flight assistant. 
 USER: Hi, I am Rebecca Scott.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my reservation, can you aid me to modify my reservation?

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Unfortunately there is no reservation found with your given name in our records.

USER: Ok, no issues. Thank you for informing me.

ASSISTANT: Thank you.