You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while.

USER: Sure, take your time.

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

USER: No issues, thank you for your time.

ASSISTANT: Thank you for opting us.