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 DFW to OAK?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: Sure, my travelling dates are from 05/09 to 05/11.

ASSISTANT: Are you fine with connecting flight?

USER: I need a single connecting flight.

ASSISTANT: Let me know your name?

USER: Myself Elizabeth Moore.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

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

ASSISTANT: Welcome.