You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Myself Ryan Roberts.

ASSISTANT: Ok.

USER: I want to change my existing reservation, because I want to travel with my friends by road. Can you please help me?

ASSISTANT: Sure, I am here to help you. Please wait.

USER: Thank you. Ok, I will wait for your response.

ASSISTANT: Thank you for waiting, we are sorry we didn't find any reservation on your name.

USER: It's ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.