You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you now?

USER: Could you please reserve my flight ticket from SEA to IAD?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your journey dates, please?

USER: My journey dates are Oct 1st and Oct 3rd.

ASSISTANT: Do you have any limit on number of connections?

USER: Yes, I am looking for a single connection.

ASSISTANT: May I know your class preference?

USER: I don't have any class.

ASSISTANT: Do you have any more specifications?

USER: I prefer to travel in normal-cost airline.

ASSISTANT: Let me know your name to proceed further for documentation purpose.

USER: Steven Nelson here.

ASSISTANT: Sorry to say that, there are no flights found on your desired routes.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us.