You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Sarah Lopez. I would like to book a ticket to Houston, can you please help me out?

ASSISTANT: Sure, can I know your preferable dates?

USER: I am travelling on these dates 08/12 and 08/14.

ASSISTANT: Ok, can I know your source and destination airport codes?

USER: I am flying from SEA to IAH.

ASSISTANT: I found a flight 1008 which matches with your preferences, can I proceed?

USER: Sure, you can proceed with this flight.

ASSISTANT: Your ticket is booked.

USER: Thank you for your valuable services.

ASSISTANT: Thank you, have a good day.