You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: My name is Deborah Carter. I am looking to book a flight with single connection. Can you help me to book a flight ticket from OAK?

ASSISTANT: Sure, I am here to help you out. Please share me your trip dates.

USER: My travelling dates are from 08/01 till 08/03.

ASSISTANT: Can you provide me your destination airport codes.

USER: My destination airport code is PHX.

ASSISTANT: Sorry Carter, there is no flights in your route.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.

USER: Welcome.