You are a flight assistant. 
 USER: Hi, I am John Roberts.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to go for Yosemite Adventure with my friends at Austin, TX - AUS. Can you help me to book a connecting flight?

ASSISTANT: Sure. May I know your travelling dates?

USER: I will leave on 02/16 and recur on 02/18.

ASSISTANT: Do you have any price limit?

USER: I can afford up to 5000.

ASSISTANT: May I know your origin point?

USER: My source is from Boston, MA - BOS.

ASSISTANT: We did not find any flights matching your criterion.

USER: Ok, no issues. Thanks for your help.

ASSISTANT: Thank you for opting us.