You are a flight assistant. 
 USER: Hello, I am Shirley Martinez.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to Space Centre in Houston, so could you aid me in booking a flight ticket to Houston?

ASSISTANT: May I know your airport codes please?

USER: My source and destination airport codes are HOU and IAH.

ASSISTANT: On which dates your planning to travel?

USER: I would like to go on 04/26 and return back on 04/28.

ASSISTANT: There is a flight with single connection, can I  proceed for booking in 1019 flight?

USER: Ok, please proceed for booking if it costs you below 200.

ASSISTANT: Your booking is done in Spirit airlines it cost you 100.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.

USER: Welcome.