You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please book me a ticket from ORD to LGA?

ASSISTANT: Sure, can you share your trip dates?

USER: My trip dates are from May 29th to May 31st.

ASSISTANT: Do you have any preferences?

USER: I prefer a lay by in between my journey.

ASSISTANT: May I know your name for documentation purpose?

USER: I am Matthew Wright.

ASSISTANT: Sorry, there is no flight on your given dates.

USER: Can you please re check with normal-cost airline?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: On your request, we have re-checked it. But, there is no flight on your given dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.