You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Shirley Williams.

ASSISTANT: How may I assist you?

USER: Can you please make my reservation from IAD to AUS?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Sure, my journey dates are Apr 03 and Apr 05.

ASSISTANT: Can you please share your airline preferences?

USER: I am okay with any airlines.

ASSISTANT: Do you have any specifications?

USER: My departing time is afternoon.

ASSISTANT: Wait a moment please.

USER: Sure, take your own time.

ASSISTANT: Shirley Williams, there are no flights available in your route.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for choosing us.