You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am looking to book a flight ticket from DFW to SEA. Can you help me for that?

ASSISTANT: Sure, please share your journey dates?

USER: My travelling dates are May 22 and May 24.

ASSISTANT: Do you have any specifications?

USER: I prefer to book a normal cost airline.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know your good name?

USER: My name is Janet Turner.

ASSISTANT: Sorry, no flights found on your given details.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for choosing us.