You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Stephanie White. I am planning to go for Rainey street walk at Austin, AUS. Can you please book a direct flight?

ASSISTANT: Sure, please provide your travelling dates along with your source code.

USER: Source code is San Francisco, SFO. Journey dates are 12/15 to 12/17.

ASSISTANT: Based on your requirements, there is no flight for you.

USER: Ok, No problem. Thank you.

ASSISTANT: Ok, thanks for reaching us.