You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I aid you?

USER: Mary Taylor here.

ASSISTANT: Ok.

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, I will help you with that.

USER: Ok.

ASSISTANT: Please wait a minute, I will check and revert you.

USER: I will wait.

ASSISTANT: Thanks for waiting, we did not found any active reservation on your name in our database.

USER: That's ok, no problem. Thank you for informing.

ASSISTANT: Thank you for choosing us.