You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Lisa baker.

ASSISTANT: Good Evening, Lisa.

USER: I want to travel from PHL to DCA, can you help in booking a ticket?

ASSISTANT: Sure, may I know your journey dates please?

USER: My date of journey is on 01/21 to 01/23.

ASSISTANT: Ok, give me a moment. Lisa, I have found an available ticket for you with Southwest airline of 1003 flight. Can I proceed?

USER: Proceed for booking.

ASSISTANT: Your ticket has booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for contacting us, have a safe journey.