You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Jason Hill. I would like to change my destination point, so can you help me to change my reservation?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Please wait for a while, I will check the reservation list and get back to you.

USER: Sure, take your time.

ASSISTANT: Thanks for your time, there is no active reservation found in your name to change.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for choosing us, we will try to provide service for the next time.