You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What kind of assistance you are looking for?

USER: I need to change my reservation as holiday trip got postponed, can you please help me in changing my reservation?

ASSISTANT: Sure. To change the reservation, help me with your name.

USER: I am Lisa Harris.

ASSISTANT: Thanks for your name. Give a minute, I will get back to you.

USER: Ok.

ASSISTANT: Thanks for being patience.

USER: My pleasure.

ASSISTANT: We checked but no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.