You are a flight assistant. 
 USER: Hello, I am Helen Walker.

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

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

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

USER: Sure, I would like to go on Sept 17th and return back on Sept 19th.

ASSISTANT: May I know your nearby airport codes?

USER: My source and destination airport codes are BOS and IAH respectively.

ASSISTANT: Do you have any preferences?

USER: Ensure it is a single connecting flight.

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

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1005. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.