You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Can you please change my existing reservation?

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

USER: My name is Samuel King.

ASSISTANT: Sorry, there are no reservations found.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for reaching us.