You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I need to change my reservation as my friend has made a reservation for me on wrong dates. Can you please check if there is any reservation found by the name Christopher Perez?

ASSISTANT: Sure, we are here to help you. It will be helpful for me, If you share me your good name?

USER: I have already mentioned above.

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

USER: Sure.

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

USER: That's alright, thanks for your response.

ASSISTANT: Thank you for choosing us.