You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am planning a business trip from PHX to EWR, can you book a ticket?

ASSISTANT: May I know your travel dates.

USER: My travel dates are 01/01 and 01/03.

ASSISTANT: May I know you name please?

USER: My name is Dennis Campbell.

ASSISTANT: Sorry Dennis, they is no flight as per you details.

USER: Ok, thank you for checking.

ASSISTANT: Thank you for reaching us.