You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: This is Cynthia Turner, can you help me to book ma flight ticket from DFW to ORD?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: I am travelling from Feb 20 to Feb 22.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: No problem, thank you for the information.

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