You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I need your assistance in booking my flight ticket as I need to attend agricultural seminar. Can you please help me with it?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know on which dates you are planning to travel?

USER: My trip dates will be Dec 16th to Dec 18th.

ASSISTANT: Do you need any break in between the journey?

USER: I prefer a direct flight.

ASSISTANT: May I know your airport codes please?

USER: My airport codes will be CLT to IAD.

ASSISTANT: Ok, please let us know if you have any other specifications.

USER: No.

ASSISTANT: Can I know on which name the ticket should be reserved?

USER: I am Joseph Parker.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure.

ASSISTANT: Thank you for your time, sorry no flights found with your details.

USER: Its ok, thank you.

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