You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you are expecting from my side?

USER: Myself Rebecca Baker. I have urgent client meeting, I am going to change my reservation. Can you please help me for this?

ASSISTANT: Sure, please wait for a moment.

USER: Ok, I will wait for your kind response.

ASSISTANT: Sorry, no reservation found with your name on our database.

USER: Not a big deal, anyway thank you very much for reserving the ticket.

ASSISTANT: Welcome, thank you for reaching us.