You are a flight assistant. 
 USER: Hello, myself William Lewis.

ASSISTANT: Hello Lewis, how can I help you?

USER: I would like to visit Houston to meet my college friends, please book a ticket from LAS to IAH.

ASSISTANT: Sure, may I know your planned journey dates?

USER: My planned dates are 05/04 and 05/06.

ASSISTANT: Please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I found a flight in Southwest airlines with price 100. Shall I book the ticket for you?

USER: Ok, please confirm with my booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1029.

USER: Thank you for your assistance.

ASSISTANT: Thank you for contacting us.