You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Thomas King.

ASSISTANT: How may I serve you?

USER: I am looking to book a flight ticket to meet my friend in Washington, can you help me for booking a flight ticket from CLT to DCA?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are Apr 14 and Apr 16.

ASSISTANT: Do you have any preferences?

USER: I need a single connecting flight in my journey.

ASSISTANT: As per your requirement, there is a flight available with Hawaiian airline. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done with flight number 1018. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.

USER: Welcome.