You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you?

USER:  I make a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you help me to change my reservation?

ASSISTANT: Sure, can I know your name?

USER: I am Barbara Carter.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: There is no reservation found on your given name.

USER: Ok, no issues. Thanks for your assistance.

ASSISTANT: Thank you for choosing us.