You are a flight assistant. 
 USER: Hi. I am Matthew Smith.

ASSISTANT: Hello, how can I support you today?

USER: I would like to go to shopping in Ferry building market place at San Francisco which is famous for wedding accessories. Can you please book me a ticket with price under 500?

ASSISTANT: Sure, please share me your dates of journey please?

USER: My dates of travel are from 03/13 to 03/15.

ASSISTANT: Kindly, mention your source and destination codes?

USER: My source and destination airport codes are Philadelphia, PA-PHL and San Francisco, CA-SFO.

ASSISTANT: We found a flight with Delta airline of flight number 1014. Shall I proceed with the booking?

USER: Ok, please confirm.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your assistance.

ASSISTANT: Thank you for availing us.