You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Joshua Martin.

ASSISTANT: How may I assist you, Martin?

USER: I am planning to book a ticket from OAK to PHL.Can you help me out to book a ticket?

ASSISTANT: Sure. Can you provide me your journey dates please?

USER: My departure date is 10/19 and return date is 10/21.

ASSISTANT: Please wait a minute.

USER: My connection limit is 1. Ok.

ASSISTANT: There is a flight with UA airlines available with price 100 matching with your preferences. Shall I book the ticket?

USER: Yes, you can proceed the booking.

ASSISTANT: Your ticket is confirmed and the flight number is 1009 for your reference.

USER: Thank you.

ASSISTANT: You are welcome.