You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: I am Elizabeth Edwards. I would like to participate in a mobile food distribution event, will be conducted by soldiers at New York, NY - LGA. Can you please book a ticket on 12/02?

ASSISTANT: Sure, May I know the return date?

USER: I intend to return on 12/04.

ASSISTANT: Please help me with your source code.

USER: I need to board at Austin, TX - AUS.

ASSISTANT: Please give a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Ok, no issue. Thanks for your prompt response.

ASSISTANT: Thank you for reaching us.