You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Anderson.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from SFO to BOS, can you please help me out?

ASSISTANT: Sure, I will help you. Could you please let me know your planned journey dates?

USER: I am travelling on these dates Aug 27th and 29th.

ASSISTANT: Kindly, mention your connection limit.

USER: I need a direct flight.

ASSISTANT: Do you have any class preference?

USER: I don't have any class preference.

ASSISTANT: Let me know, if you have any other preferences.

USER: I need departure flight in the afternoon.

ASSISTANT: Thank you for sharing the details. I am sorry to inform you that, there is no direct flight running on your journey locations.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for approaching us.