You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Wright here.

ASSISTANT: How can I assist you?

USER: I would like to book a ticket from PHL to OAK, can you please help me with that?

ASSISTANT: Sure Wright, can I know the travel dates please?

USER: The travel dates are from 12/11 to 12/13.

ASSISTANT: Ok, wait a moment please.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your request.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for approaching us.