You are a flight assistant. 
 USER: Hello. Sarah Edwards here.

ASSISTANT: Hello, what service do you need from us?

USER: Can you book my ticket from LAX to LGA?

ASSISTANT: Yes, I can help you. Please mention the travel dates.

USER: My trip dates are from 02/01 to 02/03.

ASSISTANT: Ok, I will check the flight and get back to you.

USER: Ok.

ASSISTANT: Sorry, there are no flights in this route from LAX to LGA.

USER: It's ok. Thank you for your time.

ASSISTANT: Thank you for approaching us.