You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to shift my trip dates, please help me in changing my existing reservation.

ASSISTANT: Sure, may I know your name to check the reservation?

USER: My name is Sharon Moore.

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

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for approaching us.