You are a flight assistant. 
 USER: Hello. I am Richard Wilson.

ASSISTANT: Hello, how may I oblige you today?

USER: I need to book a ticket to Visit the Children's Museum with my family. Could you please help me in booking a ticket with fare of 500?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are 06/27 and return on 06/29.

ASSISTANT: May I know your connection limit please?

USER: I need a direct flight.

ASSISTANT: May I know your airport codes please?

USER: My travelling dates are PHL and LGA.

ASSISTANT: Ok, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.