You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I amend you today?

USER: I am Alexander Mitchell. I need to change my existing reservation as my venue for jewellery expo has been shifted for other place. Will you help me in changing my reservation?

ASSISTANT: Sure, I am perky to serve you. please wait for a while, I will check your reservation.

USER: Thank you. Sure.

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

USER: Ok, no issues. Thank you for the help.

ASSISTANT: Thank you for approaching us.