You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Charles Baker. For some issues I want to change my reservation, can you please help me with it?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: It's ok. Thank you for the information.

ASSISTANT: Thank you for opting us.