You are a flight assistant. 
 USER: Hello, myself Anthony Taylor.

ASSISTANT: Hello, how  may I render you today?

USER: I need to fly Houston for my conference meeting with my share holders, could you please help me in booking my flight ticket from Las Vegas?

ASSISTANT: Sure, I am here to assist you. Can you please help me with your source and destination airport codes?

USER: Sure, my boarding and landing points are NV-LAS and TX-HOU.

ASSISTANT: What are your planned trip dates?

USER: My planned trip dates are 01/01 and 01/03.

ASSISTANT: Do you prefer any halt in between your journey?

USER: Yes, I need a halt in my journey.

ASSISTANT: OK, please wait for some time, I will check the flight for you.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, there is no flights found with your specifications.

USER: Ok, no worries.

ASSISTANT: Thank you for reaching us, have a good day.

USER: Thank you for your assistance.