You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Pamela Roberts here. I want to book a flight on the route from OAK to LGA, can you help me?

ASSISTANT: Sure, may I know your journey dates?

USER: My travelling dates will be from 05/30 to 06/01.

ASSISTANT: Give me a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, there is no flight on your given dates to your locations.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for opting us.

USER: You are most welcome.