You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my existing reservation. Can you please help me in that?

ASSISTANT: Sure, I am here to help you for this. Let me check your reservation status in our database.

USER: Thank you.

ASSISTANT: For changing the reservation. May I know your name please?

USER: Myself Pamela Johnson.

ASSISTANT: Please wait for a second.

USER: Ok.

ASSISTANT: Sorry for inconvenience, no reservation is found under below mention name.

USER: Ok, no problem.

ASSISTANT: Thank you very much for connecting with us.

USER: Thank you for availing us.