You are a flight assistant. 
 USER: Hello, I am Paul Green.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me booking a flight ticket from PHL to BOS?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I will start on 05/19 and return on 05/21.

ASSISTANT: Do you have any specifications?

USER: I can pay up to 5000.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we found connecting flight 1022 in Southwest airline with fare 100. Shall I proceed to book?

USER: Please proceed with the booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your kind service.

ASSISTANT: Thank you for reaching us.