You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: On the Occasion of Christmas Day, I have to do shopping at Phoenix, PHX. Please help me in booking a ticket with the name of Frank Johnson.

ASSISTANT: Sure, May I know the source code?

USER: Ok, Oakland, OAK is the source point.

ASSISTANT: Please help me with your journey dates.

USER: I have to start my journey on 12/24 and returns on 12/26.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your selected dates.

USER: Ok, I will go with another airline. Thank you for your kind information.

ASSISTANT: Thank you for availing us.