You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am David Mitchell. I want to book a flight ticket from HOU to SEA. Could you help me in booking?

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from Jan 16-18.

ASSISTANT: Ok, do you have any preferences?

USER: My return time should be in the evening.

ASSISTANT: Ok, please wait for a while.

USER: Ok, please check with connecting flight.

ASSISTANT: There is a flight available as per your requirements with Southwest airlines and the ticket fare is 200 only. Is that ok for you?

USER: Yes, please proceed.

ASSISTANT: Your ticket is booked in economy class and your flight number is 1024.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.