You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I want to reserve my ticket from ORD to PHL to visit Philadelphia, can you please help me in booking?

ASSISTANT: Sure, can you please provide your journey dates?

USER: Sure, my planned dates of journey are from Dec, 28 to Dec, 30.

ASSISTANT: Are you looking for any preferred connections?

USER: Yes, I want to fly in a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: Yes, I want to return at evening time.

ASSISTANT: Can I have your name to proceed further?

USER: Sure, my name is Sandra Williams.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: Ok, not an issue. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us.