You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I need to book a flight ticket under 500 to meet  my cousin.

ASSISTANT: Ok.

USER: Could you please help me with booking a flight ticket on 09/26?

ASSISTANT: Sure, may I know origin airport code?

USER: I would like to board from Charlotte, NC-CLT.

ASSISTANT: Let me know your destination airport code?

USER: I want to head to  Philadelphia, PA-PHL.

ASSISTANT: On which date would you like to return from Philadelphia?

USER: I intend to return on 09/28.

ASSISTANT: For booking process we need your name, can you please share me your name?

USER: I am Amanda Carter.

ASSISTANT: Amanda carter, there is no flight on your details.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.