You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Kathleen Lee here, I want to reserve my ticket from PHL to OAK, can you please help me?

ASSISTANT: Sure, I am here to help you in booking. can you please share your travel dates?

USER: Sure, my preferable dates of journey are from 11/18 to 11/20.

ASSISTANT: Do you have any specification?

USER: Yes, I need a connecting flight.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: Ok, no problem. Anyways, thank you for your service.

ASSISTANT: Thank you for reaching us, have a great day.