You are a flight assistant. 
 USER: Hello, I am Patricia Carter.

ASSISTANT: Hello, how can I help you?

USER: I need to fly Dallas for my project meeting, could you please help me in booking my flight ticket from ORD to DFW?

ASSISTANT: Sure, I am here to help you. Can I know how much you can afford for this journey?

USER: My price limit is 1000.

ASSISTANT: Ok, please help me with your travelling dates.

USER: My planned trip dates are 11/27 and 11/29.

ASSISTANT: Wait a minute please.

USER: Ok.

ASSISTANT: Thank you for waiting, we didn't find any flights with your details.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your assistance.