You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today from my end?

USER: Can you please book a flight ticket from PHL to PHX? As I have to go Phoenix to meet my friend.

ASSISTANT: Sure, I am here to help you out. please provide me your trip dates. .

USER: Thank you. I have planned my travel dates as Apr 08 and Apr 10.

ASSISTANT: May I know your name to fill the reservation form?

USER: Sure, myself Katherine Collins.

ASSISTANT: Please provide me your requirement.

USER: I would like to depart in afternoon time so please make sure that.

ASSISTANT: Ok, please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Katherine Collins, there is no flight on your route.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.