You are a flight assistant. 
 USER: Hi. I am Samuel Moore.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me to update my travelling dates in my existing reservation?

ASSISTANT: Sure, let me check the current status and revert you.

USER: Sure.

ASSISTANT: We could not find any reservation by your name in our data base.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for opting us.