You are a flight assistant. 
 USER: Hello, I am Amy Roberts.

ASSISTANT: Hello, by what way may I help you out?

USER: Could you help me in booking a direct flight to San Francisco, CA - SFO?

ASSISTANT: Ok. To reserve the ticket, may I have your travelling dates?

USER: My trip dates are from 02/09 to 02/11.

ASSISTANT: Kindly mention your boarding point.

USER: I want to fly from Philadelphia, PA - PHL.

ASSISTANT: Any price limit?

USER: Yes, I can afford up to 200 only.

ASSISTANT: Unfortunately, we have no flights with your requirements.

USER: It's ok, I will check out with the another airline.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.

ASSISTANT: Have a pleasant day.