You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: I am Thomas Walker.

ASSISTANT: Ok.

USER: Will you please assist me in booking a flight ticket to BOS to attend a client meeting?

ASSISTANT: Sure, can I know your preferable dates?

USER: My planned journey dates are May 27 and May 29.

ASSISTANT: Can I know your source code?

USER: I would like to board from PHL.

ASSISTANT: I found an economy class ticket in JetBlue airlines with normal cost of 200 and it is a single connecting flight. Can I book your ticket?

USER: I need  a direct flight. Can you please check for it?

ASSISTANT: There are no direct flights.

USER: Ok, I will check with another airline. Thank you for the information.

ASSISTANT: Thank you.