You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: As I need to extend my business, I am planning to shift to other place.

ASSISTANT: Ok.

USER: So, please me in change in existing reservation.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please, wait.

USER: Ok.

ASSISTANT: May I know your good name to check the reservation?

USER: I am Dennis Collins.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you for choosing us.