You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Richard Thomas. I want to change my existing reservation as my political interaction with people got postponed due to some disturbances. Can you please help me with that?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name.

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.