You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I did not know how to search and book a flight ticket, can you please help me in booking my flight ticket from OAK to ATL?

ASSISTANT: On which dates you like to travel?

USER: My travel dates are 11/27 and 11/29.

ASSISTANT: May I know your name please?

USER: Ryan Collins is my name.

ASSISTANT: I am sorry no flights found on your dates.

USER: Ok, fine not an issue. Thank you for your help.

ASSISTANT: Thank you for choosing us.