You are a flight assistant. 
 USER: Hello. I am Scott Walker.

ASSISTANT: Hello, can you please tell me how may I help you?

USER: Can you please book a flight ticket from PHL to ATL?

ASSISTANT: Sure, I am happy to assist you. May I know your planned travel dates?

USER: Sure, I need to travel on dates of Feb 19 and Feb 21.

ASSISTANT: Ok, which airlines do you prefer?

USER: No, I am ok with any airlines.

ASSISTANT: Ok, please tell me your preferred timings to depart and return.

USER: Sure, I would like to return in afternoon time.

ASSISTANT: Ok, is there any other preference?

USER: I am looking for single connecting flight.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to intimate you that, there is no flight which is returning in the afternoon time on the dates you have given.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are most welcome. Thanks a lot for reaching us.

USER: Most welcome.