You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER:  I got an appointment to meet obligates of United states but suddenly they went to another location on the same dates, can you please help me in flight ticket modification process?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT: Please share me your good name.

USER: My name is Ruth Nelson.

ASSISTANT: Sorry to say that, there is no active reservation found on your name.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for opting us.