You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket to TX-DFW, help me in booing my flight ticket from PA-PHL.

ASSISTANT: Ok, I will help you.

USER: Thank you.

ASSISTANT: Do you need a lay by in between your journey?

USER: I need a connecting flight.

ASSISTANT: When you are planning to start your journey?

USER: I want to start on 12/16.

ASSISTANT: To proceed further, I need your return date of trip.

USER: 12/18 is my return date.

ASSISTANT: Thank you for sharing your details. Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is a flight available with JetBlue airline, flight number 1019 with fare 100 and a lay by. Can I proceed to book?

USER: Please proceed.

ASSISTANT: Your reservation has been successfully done.

USER: Thank you for your help.

ASSISTANT: Thank you for contacting us.