You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you aid me to change a ticket from DTW to SEA?

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

USER: Donald Hernandez here.

ASSISTANT: Sorry, there are no reservations found.

USER: Thank you for the help.

ASSISTANT: Thank you for reaching us.