You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself George Parker.

ASSISTANT: How can I help you?

USER: As my plans to visit Oakland got postponed, can you please help me by changing the existing reservation?

ASSISTANT: Sure, please be on hold. There is no reservation found under your name to do modifications in that.

USER: Ok, not an issue. May be something went wrong while booking the ticket. Thank you for providing information.

ASSISTANT: Thank you for choosing us.