You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: This is Brandon Carter from Philadelphia.

ASSISTANT:  How can I assist you?

USER: I am planning to meet my sister after a long time who are staying in Seattle WA-SEA. Can you please book a flight ticket from PA-PHL?

ASSISTANT: Could you provide me your travel dates?

USER: My depart will be on 03/20 and arrive on 03/22.

ASSISTANT: Do you have any preference?

USER: I need a lay by. I can spend upto 1000.

ASSISTANT:  We found a connecting flight UA with flight number 1002 and fare is 100.

USER: You can proceed with the booking.

ASSISTANT:  Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT:  Thank you for availing us.