You are a flight assistant. 
 USER: Hello, I am Anthony Hill.

ASSISTANT: Hello, how can I be your helping hand?

USER: As I am a doctor, I want to conduct Medical camp at Oakland.

ASSISTANT: Ok.

USER: Can you book a ticket on 02/12?

ASSISTANT: Sure, I mirthful to help you. May I know how much you can afford for this journey?

USER: I can afford up to 200.

ASSISTANT: Can I have your return date please?

USER: I intend to return on 02/14.

ASSISTANT: Kindly, share your airport codes.

USER: I need a direct flight from Philadelphia, PA - PHL. My destination airport code is CA - OAK.

ASSISTANT: Give me a moment, I will check the availability of flights and revert to you.

USER: Sure, I will wait.

ASSISTANT: Thanks for waiting. Unfortunately, there were no flights available on your requirements.

USER: Ok, Thank you for providing information.

ASSISTANT: Thank you for contacting us.