You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: Please help me to book a flight ticket from ATL to attend my niece baby shower in SFO.

ASSISTANT: Sure, can you please share your journey dates?

USER: Sure, I am planning to start on 04/18 and my return date will be on 04/20.

ASSISTANT: Are you looking for any preferred connections?

USER: I need fly in a connecting flight for this time.

ASSISTANT: Do you have any other specifications to be met?

USER: I want to depart in the evening and my return time will be in the afternoon.

ASSISTANT: Can I have your name to proceed further?

USER: I am Amanda Miller.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: That's ok, I'll choose any alternative. Thank you for your information.

ASSISTANT: Thank you for reaching us.