You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you?

USER: I would like to go for a trekking with my friends at Mount Rainier in Austin, TX - AUS, so I need to book a flight ticket. Can you please help me?

ASSISTANT: Sure, can you please help me with your journey dates?

USER: My journey dates are 06/14 and 06/16.

ASSISTANT: May I know your origin point?

USER: DFW is my origin.

ASSISTANT: Thank you for your details. Sorry, we did not found any flights based on your given details.

USER: Ok, no issues.

ASSISTANT: May I know your name?

USER: Elizabeth Green is my name.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.