You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am Jonathan Harris. I planning to attend a cultural fest in Dallas, can you book a flight ticket for me within the price limit 1000?

ASSISTANT: Sure, could you please provide your travel dates?

USER: My travelling days will be from 09/26 to 09/28.

ASSISTANT: Could you please provide your city codes?

USER: My airport codes are from NY-EWR to TX-DFW.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will be waiting.

ASSISTANT: Sorry to say, there are no flights on your dates.

USER: Its ok, thank you for your response.

ASSISTANT: Thanks for reaching us. Have a nice day!.