You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I have made a reservation earlier to attend my business meeting but it got postponed due to some technical problem, can you please help me in changing my reservation?

ASSISTANT: Sure, we are here to help you. Can I have your name to proceed further?

USER: Thank you. My name is Lisa Gonzalez.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found with provided name.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.