You are a flight assistant. 
 USER: Hello. I am Laura Evans.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my friends marriage at Phoenix, PHX, please book me a ticket from Los Angeles, LAX.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 06/29 to 07/01.

ASSISTANT: Do you have any preference?

USER: I need a halt.

ASSISTANT: Please wait for a moment.

USER: Ok, I will wait.

ASSISTANT:  Thank you for waiting, but I am sorry to say that, there is no flights available on these dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us. Hope to serve you better next time.