You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I am Eric Brown. I want to attend my nephew birthday celebration at Austin,can you please help me with booking?

ASSISTANT: Sure, may I know your travelling details please?

USER: Sure,My travel dates are from 12/14 to 12/16. My airport codes are from BOS to AUS.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there were no flights matching with your requirements.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for reaching us, have a good day.