You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, I will help you in changing the reservation. May I know your name please?

USER: Sure, my name is Thomas Jones.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.