You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Eric Thomas. I need to change my existing reservation, can you please help me in this?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Please take your own time.

ASSISTANT: Sorry to say, no reservation found on your name.

USER: That's not an issue, thank you for searching the flights.

ASSISTANT: Thank you for reaching us, have a nice day.