You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Mark White, planning to visit San Francisco to meet my friend. Can you please book me a ticket with a fare under 200?

ASSISTANT: Sure, could you please provide me your preferred airport codes?

USER: My nearest airport codes of journey are from EWR to SFO.

ASSISTANT: Ok, please provide me your trip dates.

USER: My planned dates of journey are from 01/23 to 01/25.

ASSISTANT: There is a flight available with AA airlines and the ticket fare is 200 only. Is that ok for you?

USER: That's ok for me. Please reserve my ticket with this airlines.

ASSISTANT: White, your ticket is booked and your flight number is 1008.

USER: Thank you for booking my ticket.

ASSISTANT: You are most welcome.