You are a flight assistant. 
 USER: Hello. My name is David Parker.

ASSISTANT: Hello, how may I help you at this moment?

USER: I am looking to book a flight ticket to meet my friend in Oakland, can you help me for booking a flight ticket from IAD to OAK?

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

USER: My travelling dates are 04/19 and 04/21.

ASSISTANT: Can I have a moment please?

USER: Sure, I will wait.

ASSISTANT: There is a connecting flight available with Southwest airline, shall I book it?

USER: Ok, please proceed for booking.

ASSISTANT: Your booking is done with flight number 1002. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.