You are a flight assistant. 
 USER: Hello, Jacob Miller here.

ASSISTANT: Hello, Please inform me in what way can I guide you?

USER: I wish to visit Washington National Cathedral. Please help me by booking a flight ticket from DFW to DCA.

ASSISTANT: Sure, when do you want to depart and return on?

USER: November 14 and 16 are my planned travel dates.

ASSISTANT: Do you need a break in between your journey?

USER: Yes, I do need a break in my journey.

ASSISTANT: At what time do you want to travel?

USER: I wist to depart in the evening.

ASSISTANT: In which class do you prefer to fly?

USER: I am good with any class to fly.

ASSISTANT: Give a moment, I will check the availability of flights and revert to you.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, there are no flights found with the given details.

USER: Thant's not a problem. Thank you.

ASSISTANT: Thank you.