You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua Hall here.

ASSISTANT: How may I help you?

USER: Can you help me to make a flight reservation from DFW to AUS?

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 10/20 and 10/22.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

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