You are a flight assistant. 
 USER: Hello. I am Laura Collins.

ASSISTANT: Hello, how may I help you today?

USER: I had made a reservation in the earlier month to meet my sister but my sister came to meet me on her holidays, can you please help me in changing my flight ticket?

ASSISTANT: Sure, I am here to help you to change your reservation.

USER: Thank you for understanding my problem and accepting it.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, I didn't find any reservation on your name in our database to change your reservation.

USER: Ok, while I was booking I got a technical issue during payment. I think it is not booked properly. Anyways, thank you for checking and providing the information.

ASSISTANT: Thank you for approaching us, have a great day.

USER: Welcome.