You are a flight assistant. 
 USER: Hello, I am Scott Davis.

ASSISTANT: Hello, how can I help you?

USER: I want to attend my grand father's funeral on 06/19 at DEN. Can you please help me with this?

ASSISTANT: Sure, I can book a flight ticket for you.

USER: Sure.

ASSISTANT: From where do you want to start your journey?

USER: My source code is LAX and return on 06/21 with price limit of 5000.

ASSISTANT: Ok, just let me check and I will get back to you.

USER: Ok.

ASSISTANT: Gladly, a flight of Southwest airline conforms all of your needs. Details are as follows: flight number- 1009, price- 200. Do you want me to proceed?

USER: Sure, you may proceed.

ASSISTANT: Ok, your flight has been booked. Have a safe journey.

USER: Thank you for assisting me.

ASSISTANT: Thanks for choosing us. Our condolences is with you.