You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Thompson.

ASSISTANT: Thompson, how may I help you?

USER: As my meeting got postponed at Dallas, can you please help me in changing my existing reservation?

ASSISTANT: Sure, I am here to help you. Let me check your reservation status in our database.

USER: Sure, I will wait for your response.

ASSISTANT: Angela sorry to intimate, no reservation is found on your name in our database.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: You are welcome.