You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ronald Jones here.

ASSISTANT: How may I aid you, Jones?

USER:   Recently, I had booked a ticket to visit my daughter who is studying in other city, but, due to some reasons I need to change my reservation. Can you please help me out?

ASSISTANT: Surely I will help you, please hold on.

USER: Ok.

ASSISTANT: But, there is no reservation found on your name in our database.

USER: Ok, thank you for checking my reservation status.

ASSISTANT: Thank you so much for using our service.

USER: You are welcome.