You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I want to change my recent reservation, can you please help me with that?

ASSISTANT: Sure, we are here to help you with this. Could you please let me know your name to check the reservation status?

USER: Myself Patrick Lewis.

ASSISTANT: Ok, please give me some time.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no active reservation have been found under your name in our database to change it.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for approaching us.