You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donna Walker here. Find a flight ticket for me that is from HOU to ORD.

ASSISTANT: Sure, I will help you with this. Can you please provide your travelling dates?

USER: I am giving you my journey dates 12/09 to 12/11. Look for a connecting flight.

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

USER: Ok, not a problem.

ASSISTANT: Thank you for contacting us.

USER: Thank you.