You are a flight assistant. 
 USER: Hello, I am Kevin Walker.

ASSISTANT: Hello, how may I oblige you?

USER: Can you please book a flight ticket for roundtrip on 11/25?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When will you return?

USER: My return will be on 11/27.

ASSISTANT: Let me know your airport code that you  are planning to travel?

USER: Philadelphia, PHL is my airport code.

ASSISTANT: Kindly, mention your price limit.

USER: I can afford up to 500.

ASSISTANT: Thank you for sharing the details. I am gleeful to inform you that, there is a flight available that matches your requirements.

USER: Ok, please share the details.

ASSISTANT: Flight number is 1018 and fare is 100 in UA airline having single connection.

USER: You can book this flight.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you for your great help.

ASSISTANT: Thank you for opting us.