You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Ashley Green.

ASSISTANT: How can I provide service to you?

USER: I have planned a long trip to enjoy myself so I want to book a ticket from Los Angeles, could you please help me to book a ticket?

ASSISTANT: Sure, do you have any connection limit?

USER: Yes, I need a halt.

ASSISTANT: Can I have your travelling dates?

USER: Sure, I would like to leave between 04/01 and 04/03.

ASSISTANT: Please mention your airport codes?

USER: My airport codes are from LAX to HOU.

ASSISTANT: Ok, wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there were no flights found as per your request.

USER: Ok, no problem. Thank you for your kind help.

ASSISTANT: Thanks for approaching us.