You are a flight assistant. 
 USER: Hello, I am Melissa Garcia.

ASSISTANT: Hello, how may I support you?

USER: I am planning to Visit wine country tour shuttle at San Francisco, CA-SFO. So can you please help me in booking a flight ticket from Philadelphia, PA-PHL?

ASSISTANT: Sure, may I know when are you planning to make your journey?

USER: My journey dates are from 07/15 to 07/17.

ASSISTANT: Do you need a way station?

USER: Yes, I need a way station.

ASSISTANT: How much can you spend for this booking?

USER: I can spend up to 1000 from my budget.

ASSISTANT: Thanks for sharing your details. There are no flights available on your requested dates.

USER: Ok, no problem at all. Thanks for your information.

ASSISTANT: Thank you for opting us.