You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Anthony Campbell, can you please book me a plane ticket from 11/02 to 11/04?

ASSISTANT: Please share your desired airport codes?

USER: Sure, my source and destination codes are from LAS to LGA.

ASSISTANT: There is no flight available on your desired travel dates.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for opting us.