You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you help me to book a flight ticket from OAK to BOS?

ASSISTANT: Sure, May I know the travelling dates?

USER: I want to take off on 09 Mar and return on 11 Mar.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Matthew Roberts.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for opting us.