You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to travel from SFO to BOS, help me in booking a flight?

ASSISTANT: Sure, let me know your travelling dates?

USER: My travelling dates are Dec 12 to 14.

ASSISTANT: Do you want connecting flight or direct flight?

USER: I want direct flight.

ASSISTANT: Please share your airline preference.

USER: I prefer to travel in Normal-cost airlines.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: Sorry I don't have.

ASSISTANT: May I know your name?

USER: I am Margaret Gonzalez.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.