You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: I will help you with that please share your name to proceed further?

USER: I am Steven Parker.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Sure, take your own time.

ASSISTANT:  I am very sorry to inform you that there is no reservation found under your name in our database.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.