You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Could you please book a ticket under the price limit of 500?

ASSISTANT: Sure, may I know your source and destination?

USER: I want to start my journey from Los Angeles, LAX to Philadelphia, PHL.

ASSISTANT: Could you please provide me your depart and return dates?

USER: My departure date is 07/19 and arrival date is 07/21.

ASSISTANT: May I know your name please?

USER: My name is Edward Davis.

ASSISTANT: We found a Frontier airline, flight number: 1013, price: 100 with one connection. Shall I proceed to booking?

USER: Yes, proceed.

ASSISTANT: Your booking is done.

USER: Thank you for assisting me.

ASSISTANT: Thank you, happy journey.