You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight ticket from DFW to SEA?

ASSISTANT: Sure, can you share me your travelling dates?

USER: My travelling dates are 26 and 28 of Dec.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your airline preference?

USER: No. I prefer to travel in business class.

ASSISTANT: May I know your name to proceed further?

USER: I am Barbara Lopez.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights found on your name.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.