You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am William Green.

ASSISTANT: How may I assist you?

USER: I want to go for a holiday vacation with my family to Houston. Please, make me the plane reservation for a round trip.

ASSISTANT: Sure, may I know your travel dates?

USER: I will start my journey on 02/27. I will return on 02/29.

ASSISTANT: Please share me your airport code?

USER: My source airport code is Houston, TX - IAH. My destination is Houston, TX - HOU.

ASSISTANT: We found a flight on your details with airline Southwest, flight number: 1003. Shall I book this ticket?

USER: Proceed with my booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you so much.