You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Campbell. I want to travel from PHX to LAS. Can you book a flight ticket for me?

ASSISTANT: May I know your travel dates?

USER: I want to fly on 02/01 and 02/03.

ASSISTANT: Do you have any specifications?

USER: I am looking for a direct flight. Please check for that.

ASSISTANT: There is no flight on your route.

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

ASSISTANT: Thank you.