You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Ryan Wright. I want to book a flight ticket to Hardvard Campus with my friend at Boston BOS. Can you help me with booking from Austin AUS?

ASSISTANT: Sure, I can help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are 04/09 and 04/11.

ASSISTANT: Do you need any break?

USER: No, I need a direct flight.

ASSISTANT: Ok. Thank you for providing all necessary details. Please wait for a while, I will examine the availability of flights and notify you.

USER: Sure.

ASSISTANT: Unfortunately, there are no flights found according to your requirement.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.