You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: My name is Stephanie Baker, I want to book a flight ticket in economy class to visit Oakland. Can you book a connecting flight for me?

ASSISTANT: Sure, can you share me your travelling dates?

USER: I will fly on 23rd June and return on 25th June.

ASSISTANT: I need to know your travelling airport codes?

USER: My source point is PHL and my destination is OAK.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your desired route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.