You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I support you?

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, I am here to help you. Please mention your name.

USER: Sure, my name is Barbara Anderson.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, There was no reservation found on your name in our database.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you for approaching us.