You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me with booking a flight ticket from IAD to SFO?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are Apr 24 and 26.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Are there any other specifications?

USER: That's all, thanks for asking.

ASSISTANT: Please forward your name.

USER: My name is Jacob Walker.

ASSISTANT: There are no flights found on your specified trip dates.

USER: That's ok, thank you.

ASSISTANT: Thank you for availing us.