You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Parker.

ASSISTANT: How can I help you, Linda Parker?

USER: As my meeting got postponed, can you please help me by changing the existing reservation?

ASSISTANT: Sure, please wait for a minute Linda.

USER: Thank you.

ASSISTANT: Linda Parker, there is no reservation found with your details.

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

ASSISTANT: Thank you for choosing our agency.