You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I serve you?

USER: I am Christine Rodriguez planning to visit Dallas & Fort Worth, can you book a ticket with price under 1000?

ASSISTANT: Sure, please provide your journey dates.

USER: Sure, my travel dates are 09/25 and 09/27.

ASSISTANT: Ok, can you provide your journey codes for further booking?

USER: Sure, I would like to travel from DFW to ORD.

ASSISTANT: Ok, Thank you for the information there is no flight found matching your requirements.

USER: Ok, no issue. Thank you.

ASSISTANT: Have a good day.