You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Mark Jones here.

ASSISTANT: How can I aid you?

USER: I am looking for a flight ticket with depart time in the afternoon hours. So can you book it for me?

ASSISTANT: Sure, please provide me your travel details.

USER: Yes, my travel dates are from Jan 20 to Jan 22.

ASSISTANT: May I know your airport codes please?

USER: The airport codes are from ATL to SEA.

ASSISTANT: Do you have any specifications?

USER: I am looking for a single connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no flights are found.

USER: Ok, that is not a problem.

ASSISTANT: Anyways, thank you for reaching us.

USER: Thank you.