You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking my flight ticket from ATL to OAK?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my trip dates are from 07/17 to 07/19.

ASSISTANT: Can you please share your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: I need a single connecting flight. Also, I would like to prefer normal cost airline.

ASSISTANT: May I know your name please?

USER: Myself Emily Harris.

ASSISTANT: Emily Harris, there are no flights available in your route.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.