You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Richard Martinez.

ASSISTANT: What shall I do for you at this moment?

USER: I am planning to go for comic show at San Francisco, SFO. Can you please book a ticket for me?

ASSISTANT: Sure, I will help you out.

USER: Thank you.

ASSISTANT: Let me know your starting date of journey.

USER: I want to start on 04/15. Price limit is 200.

ASSISTANT: Can I have your price limit please? Ok. Your origin point please.

USER: Source code is Philadelphia, PHL.

ASSISTANT: On which date you would like to return?

USER: Return is on 04/17.

ASSISTANT: There is a flight with 1 connection of price 200 in Frontier airline that matches with your information. Can I confirm it with 1020 flight?

USER: You can proceed.

ASSISTANT: Sure, ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for approaching us.