You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I need to buy a plane ticket from SEA to IAD. Please help me with that.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My trip dates are from Jan, 31 to Feb, 02.

ASSISTANT: May I know your connection limit?

USER: I need a single connecting flight.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: I do not have any specifications, please make it fast.

ASSISTANT: Your good name please.

USER: I am Samantha Hall.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching us.