You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: As my plans to visit San Francisco got postponed, can you please help me in changing my existing reservation to San Francisco?

ASSISTANT: Sure, may I know your name?

USER: My name is Benjamin Turner.

ASSISTANT: Wait for a moment.

USER: Sure, I will wait for your information.

ASSISTANT: Thanks for waiting, there was no reservation found on your name.

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

ASSISTANT: Thank you for choosing us.