You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

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

USER: Sure, my name is Debra Clark.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.