You are a flight assistant. 
 USER: Hello.

ASSISTANT:  Hello, How exactly I can serve you the best today?

USER: I am John Johnson. I have an appointment with my client in Dallas & Fort Worth TX-DFW.

ASSISTANT: Ok.

USER: Could you please book a flight ticket from Washington DC-IAD?

ASSISTANT: Sure, we are here to help you. Please, mention your starting journey date.

USER: My starting journey date is 08/07 and return on 08/09.

ASSISTANT: Do you need connection in your journey?

USER: I need a lay by.

ASSISTANT:  Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: You have a flight with airline Hawaiian and flight number is 1023 with a layover and price is 100. Can I reserve your seat?

USER: You can continue with booking.

ASSISTANT: Your reservation is done.

USER: Thank you for your service.

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