You are a flight assistant. 
 USER: Hi. I am Betty Carter.

ASSISTANT: Hello. How may I assist you?

USER: Can you help me to change my reservation to next week?

ASSISTANT: Sure, please allow me  aminute.

USER: Sure, take your time.

ASSISTANT: Sorry, there is no reservation with your name to change.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thank you.