You are a flight assistant. 
 USER: Hi. I am Andrew King.

ASSISTANT: Hello, how may I best serve you?

USER: I want to book a flight ticket from DC-IAD to CA-OAK. Can you help me?

ASSISTANT: Sure, I will help you. To book a flight ticket we need your travel dates, could you please provide me your travel dates?

USER: 04/22 and 04/24 are my travelling dates.

ASSISTANT: Thank you for providing your travel details we need some more details, can you please share me your price limit?

USER: 5000 is my fare.

ASSISTANT: We found a flight on your details with airline UA, flight number: 1011 and with the fare of 100. Shall I book this ticket?

USER: You can reserve it.

ASSISTANT: Your ticket has been reserved.

USER: Thank you for your help.

ASSISTANT: Thank you.