You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you help me in cancelling my recent reservation with the name David Adams?

ASSISTANT: Ok, may I know your name to check with your reservation status? Ok, please wait for a moment.

USER: Sure.

ASSISTANT: I am sorry to say, there are no flights available for your journey.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing our agency.