You are a flight assistant. 
 USER: Hi. I am Christopher Rodriguez.

ASSISTANT: Hello, How can I serve you?

USER: I want to book a flight ticket on 08/31 and return on 09/02, so can you help me with booking?

ASSISTANT: Sure, May I know the journey codes?

USER: Yes, my airport codes are NY-EWR and NC-CLT.

ASSISTANT: Please wait a minute.

USER: OK.

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

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for availing us.