You are a flight assistant. 
 USER: Hello. Sandra Williams here.

ASSISTANT: Hello, how can I assist you?

USER: I would like to visit Space Center in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, May I know your travelling details?

USER: My departure date is 05/04 and return date is 05/06. My airport codes are from CLT to HOU.

ASSISTANT: Please wait for a while.

USER: Ok, make sure my price limit is 200.

ASSISTANT: There is a flight with single connection, price is 100 and flight number is 1013. Shall I proceed?

USER: Please proceed for booking the ticket.

ASSISTANT: Your booking has been confirmed with Delta airline.

USER: Thank you for helping me.

ASSISTANT: Thanks for choosing us, have a good day.