You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am Raymond Martin.

ASSISTANT: Ok.

USER: Can you please help me in changing my flight ticket reservation due to some problems?

ASSISTANT: Ok, sure. Please wait.

USER: Sure.

ASSISTANT: Sorry, Martin no reservation  found on your name to change.

USER: Ok, that's fine no problem with that one, I can look after some time. Thank you for your help.

ASSISTANT: Ok, fine. Thank you for reaching us.