You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Harris.

ASSISTANT: How may I help you out today?

USER: I have a plan to do hiking with my fiends at Mount Bonnell.

ASSISTANT: Ok.

USER: Can you please book a ticket to Austin, AUS?

ASSISTANT: Sure, I am mirthful to help you. When are you planning to do hiking?

USER: My planned dates are 08/15 to 08/17.

ASSISTANT: Please share the departure point.

USER: Origin code is Detroit, DTW.

ASSISTANT: Do you have any specifications?

USER: I need connecting flight. Price limit is 500.

ASSISTANT: Ok, Thanks for sharing your details. Unfortunately, no connecting flights are available.

USER: No problem. Thank you.

ASSISTANT: Thanks for choosing us.