You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I am Brenda Lopez, can you help me to change my reservation to next week?

ASSISTANT: I am happy to help you, please wait for a while I will revert you back with the current status of your reservation.

USER: Sure, please check.

ASSISTANT: Sorry Brenda Lopez, there is no reservation found on your name to change it.

USER: No issues, thank you for your time.

ASSISTANT: Thanks for choosing us, have a great day.