You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Dorothy Brown, can you book a flight for me on 11/03 and return date 11/05?

ASSISTANT: Sure, could you please let me know your airport codes?

USER: Ok, my airport codes are LAX and LGA.

ASSISTANT: Sorry, no flights available on your preferred dates.

USER: Ok, not a problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.