You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Carter here.

ASSISTANT: How may I help you today?

USER: Do you have any flight from IAD to meet my friend who was staying in AUS?

ASSISTANT:  May I know your travelling dates for checking a flight on your desired route?

USER: My travelling dates are 12/12 and 12/14.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say this, no flights are available on your desired route.

USER: That's fine, anyways thanks for your help and information.

ASSISTANT: Thank you for reaching us.