You are a flight assistant. 
 USER: Hello, I am Karen Lewis.

ASSISTANT: Hello, how can I help you today?

USER: Please book me a ticket with price under 200.

ASSISTANT: Sure, may I know your travelling dates?

USER: I am willing to start on 07/31 and would like to return on 08/02.

ASSISTANT: May I know your corresponding airport codes?

USER: I want to go for shopping at Pioneer Plaza in Dallas & Fort Worth, TX - DFW from Charlotte, NC - CLt.

ASSISTANT: Sure, please mention your price limit?

USER: I can pay up to 200.

ASSISTANT: There is a Hawaiian 1001 airline which matches your requirements. Shall I proceed?

USER: Yes, please proceed with this booking.

ASSISTANT: Your booking has been confirmed on name of Karen Lewis.

USER: Thanks for your support.

ASSISTANT: Most welcome.