You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I want to travel DFW from OAK, can you please help me with this?

ASSISTANT: Sure, can you please share your journey dates?

USER: My trip dates are Dec 19 and Dec 21.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I would like to return in the evening.

ASSISTANT: Do you have any other requirements to be met?

USER: I prefer normal cost airline.

ASSISTANT: May I know your name?

USER: Myself Susan Scott.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.