You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How shall I help you?

USER: I would like to participate in Nutshell Bike tour at Austin, TX - AUS, will you help me in booking a flight ticket on 05/04?

ASSISTANT: Please provide your origin airport code?

USER: My source is Charlotte, NC - CLT.

ASSISTANT: Please let me know your return date?

USER: I intend to return on 05/06.

ASSISTANT: Please mention connections limit?

USER: I need a halt in between the journey.

ASSISTANT: Please provide your name?

USER: My name is Benjamin Johnson.

ASSISTANT: No flights are available for your requirement.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks.