You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Sandra Young.

ASSISTANT: Sandra, how can I help you now?

USER: On a sudden business meet I need to travel to another city, so, I want to change my trip what recently I had booked a ticket, could you help me in that?

ASSISTANT: Sure, I am here to you. Please wait for a moment, I will check the details of the flights.

USER: Ok sure.

ASSISTANT: Thank you for waiting Sandra. Sorry for the inconvenience, there is no reservation found on your name.

USER: That's ok.

ASSISTANT: Do you have any other preferable dates to travel?

USER: Thank you.

ASSISTANT: You are welcome.