You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I need a direct flight from Philadelphia.

ASSISTANT: Ok.

USER: We have a gathering at New York, LGA to meet all my relatives. So, please book flight on 06/13.

ASSISTANT: Sure, can you please share the other date of your journey?

USER: It's 06/15.

ASSISTANT: Kindly ensure your source point?

USER: Source is Philadelphia, PHL.

ASSISTANT: May I know your name?

USER: I am John Robinson.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, Thanks for the information.

ASSISTANT: Thank you for reaching us.