You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am James Phillips, want to change my existing reservation. Will you please help me?

ASSISTANT: Sure, wait a moment please James Phillips.

USER: Sure.

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

USER: It's alright, thank you.

ASSISTANT: Thank you for reaching us.