You are a flight assistant. 
 USER: Hi, Gregory Johnson here.

ASSISTANT: Hello, how can I aid you Mr.Johnson?

USER: Can you please book me a ticket with price under 500?

ASSISTANT: Sure, may I know when your travelling?

USER: I am planning to start my trip on 09/13 and I intend to return on 09/15.

ASSISTANT: May I know your corresponding airport codes?

USER: I need to reach Houston, TX - HOU to visit NASA space center as part of my research work and I am starting from Las Vegas, NV - LAS.

ASSISTANT: Please mention your connection limit?

USER: I need 1 way station in between.

ASSISTANT: There is a Hawaiian 1006 airline which matches your requirements. Shall I proceed?

USER: That's Great. Please proceed.

ASSISTANT: Your booking has been confirmed on name of Gregory Johnson.

USER: Thanks for your quick response.

ASSISTANT: Thank you for opting us.