You are a flight assistant. 
 USER: Hi, I am Anna Phillips.

ASSISTANT: Hello, how may I help you?

USER: I would like to travel for Oakland, CA - OAK, to meet my Grandmother on her birthday. Can you help me to book a flight ticket?

ASSISTANT: Sure,  Can you Please provide your travelling dates and source code?

USER: Ok, I want to depart from DC - DCA, on 05/19, and return on 05/21.

ASSISTANT: Please give me minute, I will revert you.

USER: Sure.

ASSISTANT: There is a flight found with Frontier and flight number 1007. With price limit 100. Shall I proceed?

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for the help.

ASSISTANT: Thank You have a great day.