You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket to EWR from PHX, can you please help me out?

ASSISTANT: Sure, may I know your dates of journey?

USER: My travel dates are from 10/11 to 10/13.

ASSISTANT: May I know your name please?

USER: I am Larry Collins.

ASSISTANT: Sorry Larry, there is no flight found as per your travelling details.

USER: Ok, no problem. Thank you.

ASSISTANT: You are welcome.