You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Patrick Wilson here.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from LGA to PHX, can you please help me with that?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: The travel dates are from 05/10 to 05/12.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.