You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Nelson.

ASSISTANT: Shirley, how can I assist you?

USER: I would like to visit Space Center in Houston as there is a exhibition of air crafts. Can you please book a flight ticket from SFO to IAH?

ASSISTANT: Ok. Please wait for a moment.

USER: Sure, my travel dates are 09/28 and 09/30.

ASSISTANT: Flight number 1020 of UA airlines is available for you.

USER: Ok, please confirm it.

ASSISTANT: Your ticket is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us.