You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What can I do for you today?

USER: I would like to change my reservation as my schedule is changed, can you please help me with that?

ASSISTANT: Sure, may I know your name please?

USER: Janet Hernandez here.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: There is no existing reservation found on your name in our records.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.