You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Samantha Adams here.

ASSISTANT: How may I assist you?

USER: Please reserve a flight ticket from DCA to LGA for my business meeting.

ASSISTANT: Sure, let me know your travel dates?

USER: Thank you, my departure is on May 11 and please book my return ticket also on May 13.

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

USER: Yes, I need a halt.

ASSISTANT: Do you need any specifications?

USER: Please book my return flight at the time afternoon.

ASSISTANT: Please hold on a minute.

USER: Sure, take your time.

ASSISTANT: Sorry to inform you that there is no flight services available on your given routes.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to reach my destination.

ASSISTANT: Thanks for reaching us, have a nice day.

USER: Thank you for the information.