You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Will you please help me to modify my travelling dates?

ASSISTANT: Sure, I am here to help you with that, may I know your good name to proceed further?

USER: My name is Richard Thompson.

ASSISTANT: Sorry to inform you that there is no active reservation on your given name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.