You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kenneth Campbell.

ASSISTANT: How may I assist you today?

USER: Can you help me in booking my flight ticket from IAD to AUS?

ASSISTANT: Sure, can you please mention your travelling dates?

USER: My trip dates will be Oct 27th to Oct 29th.

ASSISTANT: Do you need any specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your preferred travelling timings?

USER: My return time should be in the afternoon.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flight tickets available on your journey dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching our service.