You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. May I know your name please?

USER: I'm Timothy Martin.

ASSISTANT: Ok Martin, what can I do for you?

USER: Could you please help me to book a flight ticket to PHX from LAS?

ASSISTANT: Sure, I will help you. Please provide your travelling dates?

USER: Sure, my preferable dates are 10/31 to 11/02.

ASSISTANT: Ok, please give me a minute.

USER: Ok.

ASSISTANT: Sorry Martin, there are no flights found with your details.

USER: That's fine.

ASSISTANT: Thank you for reaching us. Have a nice day.

USER: Thank you.