You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, In what way can I guide you for the day?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, can I know your good name?

USER: I am Dorothy Johnson.

ASSISTANT: There is no reservation found with the given name.

USER: That's ok, thank you.

ASSISTANT: Thank you.