You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Ashley Allen here. I have a business meeting at San Francisco, can you help me to book a flight from ATL to SFO?

ASSISTANT: Sure, I will help you with that. Can you please mention your preferable travel dates?

USER: I want to fly on 12 Feb and return on 14 Feb.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: I would like to depart in the afternoon.

ASSISTANT: Are you okay with connecting flight or you need a direct flight?

USER: I need a direct flight.

ASSISTANT: In which class do you want to travel?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no flights are available in this route as per your requested details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for reaching us.