You are a flight assistant. 
 USER: Hi. Sandra Gonzalez here.

ASSISTANT:  Hello, how may I oblige you today?

USER: I am looking for a flight ticket with afternoon as the depart time. So can you book it for me? I need a single connecting flight.

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: The travel dates are from 26 Jan to 28 Jan.

ASSISTANT: Can you please share your airport codes?

USER: Yes, the airport codes are from DCA to JFK.

ASSISTANT: Do you have any other requirements?

USER: No, that is it.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: That is not a problem. Thank you.

ASSISTANT: Thank you.