You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please guide me in booking my flight ticket from SEA to DFW?

ASSISTANT: Sure, to book a ticket may I know your travelling dates?

USER: My trip dates will be Nov 12th to Nov 14th.

ASSISTANT: Do you have any other specifications?

USER: I prefer a connecting flight.

ASSISTANT: Can you please share me your name?

USER: I am Kenneth Lee.

ASSISTANT: Unfortunately there is no flight found with your given information.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.