You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to fly from SFO to IAD. Can you book a ticket from that route?

ASSISTANT: Sure, please help me with your travel dates.

USER: My planned travel dates are 04/06 and 04/08.

ASSISTANT: May I know your name?

USER: Joseph Hill here.

ASSISTANT: Do you need any break in between your journey?

USER: I want a flight with single connection.

ASSISTANT: Do you have any other preferences?

USER: Make sure that my return time should be in the evening only.

ASSISTANT: Is there any class preferences?

USER: No more specifications please.

ASSISTANT: Sorry, we did not find any flights for you.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.