You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Larry Evans, can you please help me in booking a flight ticket from PHL to SFO?

ASSISTANT: Sure, I will help you to book a flight.

USER: Thank you.

ASSISTANT: Can you share me your travelling dates?

USER: My planning dates are from 08/01 till 08/03.

ASSISTANT: Ok, give me a moment.

USER: Ok, take your time.

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

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.