You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I want to book a flight ticket to attend Philadelphia, PHL International Auto Show, they are exhibiting more than 400 vehicles from many branded companies. Can you help me to book a ticket from Houston, HOU?

ASSISTANT: Sure, let me know your budget.

USER: Price should not cross 500.

ASSISTANT: Can you please mention your travelling dates?

USER: Dates are 12/12 and 12/14.

ASSISTANT: Ok, please wait for a couple of minutes.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight in 1008 Spirit with a fare of 100. Shall I proceed for booking?

USER: Go ahead.

ASSISTANT: To proceed further, may I know your name?

USER: Patrick Williams here.

ASSISTANT: Ok, the ticket has been confirmed on your name.

USER: Thank you so much.

ASSISTANT: Thank you for opting us.