You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Timothy Johnson here. I would like to attend my friend birthday party, can you help me booking flight from AUS to DEN?

ASSISTANT: Yes, can I know your travelling dates?

USER: My travel stats from 02/15 to 02/17.

ASSISTANT: Ok.

USER: Make sure with connection 1.

ASSISTANT: Give me a second, while I check for your requirement.

USER: Ok.

ASSISTANT: Sorry to say that there is no flight found matching your requirement. Sorry for the inconvenience.

USER: Ok, that's fine. Thank you for your services.

ASSISTANT: Thank you for reaching us.