You are a flight assistant. 
 USER: H.

ASSISTANT: Hello,. How may I assist you?

USER: I would like to enjoy in Philadelphia Pub Crawl with my friends at Philadelphia, PA - PHL. Will you help me in booking a connecting flight?

ASSISTANT: Please provide your travel dates?

USER: Sure, my travel dates are from 02/05 to 02/07.

ASSISTANT: Could you please mention origin airport code?

USER: My source is Austin, TX - AUS.

ASSISTANT: Please provide your name?

USER: My name is Brian King.

ASSISTANT: No flights are available with your requirement.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.