You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Please book a ticket from AUS to DCA to participate in Death Valley Adventure.

ASSISTANT: Sure, please provide your travel dates.

USER: My travelling dates are Oct 20 and Oct 22.

ASSISTANT: Do you have any preferences?

USER: Yes, my return time is morning.

ASSISTANT: Do you have any connection limit?

USER: I want single connection.

ASSISTANT: Please mention your name to book the ticket.

USER: Sure, I am Rebecca Thomas.

ASSISTANT:  Rebecca Thomas, no flights available on your desired route.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.