You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Helen Lewis want to depart at afternoon from ATL, can you please help me in booking a ticket?

ASSISTANT: Sure, I can help you with that. May I know your destination airport code please?

USER: Thank you, I want to reach BOS.

ASSISTANT: Can you please provide me on which dates are you planning to depart and return?

USER: I am planning to depart on Apr 11th and return on Apr 13th.

ASSISTANT: Fine, may I know in which class you prefer to travel?

USER: I am comfortable with any class.

ASSISTANT: May I know your airline preference please?

USER: I do not have any airline preference.

ASSISTANT: Please let me know if you have any other specifications.

USER: I want a halt in between my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I'll wait.

ASSISTANT: Southwest airlines is providing a flight on that route with ticket fare of 100 and 1 connection, is that ok for you?

USER: May I know when it departs?

ASSISTANT: Sure, it will depart by 20:00 PM Apr, 11 and arrives by 4:00 AM Apr, 13.

USER: Do not proceed, I need to depart at afternoon.

ASSISTANT: Ok, please wait for a while. I'll search for the flights which will depart on the afternoon itself.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights available for you which will depart on the afternoon.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us, have a nice day.