You are a flight assistant. 
 USER: Hello.

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

USER: Can you help me to reserve a flight ticket from ORD to DEN?

ASSISTANT: I am here to help you about that, can you please let me know your planned dates of journey?

USER: My travelling dates are 07 and 09 of July.

ASSISTANT: Do you have any limits on number of connections for this trip?

USER:  I am willing to travel in a single connecting flight.

ASSISTANT: Do you have any other requirement for your journey?

USER: I would like to depart in the evening.

ASSISTANT: Can you please let me know your name for booking purpose?

USER: I am Emma Parker.

ASSISTANT: Sorry Emma Parker, there are no flights which travels on your route.

USER: It's ok, not a problem, thank you.

ASSISTANT: You are welcome, thank you for reaching us.