You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Alexander Lewis want to visit DEN, can you help me to book a flight from ORD?

ASSISTANT: Please provide your itinerary dates.

USER: My travelling dates are Oct 06 and 08.

ASSISTANT: Do you have any specifications?

USER: I am looking for single connection flight.

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

USER: No issues, thank you for your time.

ASSISTANT: Thank you for reaching us.