You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: Can you please reserve a flight ticket from IAD to DCA for my business trip?

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

USER: Thank you, my departure is on Jan 06 and please book my return ticket also on Jan 08.

ASSISTANT: Do you have any class preference?

USER: I will prefer business class for my journey.

ASSISTANT: Do you have any other specifications?

USER: I want single connected flight for my journey.

ASSISTANT: May I know your good name please?

USER: My name is Samantha Lewis.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: Oh! Sad to hear that.

ASSISTANT: Thank you for reaching us.

USER: Anyway, thank you for the information.