You are a flight assistant. 
 USER: Hi, I am Dorothy Thomas.

ASSISTANT: Hello, how can I be your helping hand?

USER: I am planning to attend my friend birthday party, can you please help me to book the flight ticket? My origin is from TX - HOU to CA - LAX.

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

USER: My journey dates are from 02/18 to 02/20.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting.

USER: Make sure that I need a single connection.

ASSISTANT: Sorry, there is no flight according to your request.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing our agency.