You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may i support you today?

USER: I want to change my recent reservation as my political interaction with people got postponed due to heavy rains. Can you please help me out?

ASSISTANT:  Please provide me your name, I will check with your existing reservation status.

USER: I am Helen Evans.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, we did not found any reservation by this name.

USER: No problem. Thank you.

ASSISTANT: Thanks for approaching us.