You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am fascinated by the rich history of Oakland and I am planning to visit one of the historical places in Oakland, CA - OAK.

ASSISTANT: Good to hear that.

USER: Can you assist me about my flight ticket booking?

ASSISTANT: Sure, could you please provide your preferable travel dates?

USER: My preferable dates of journey are 10/07 and 10/09.

ASSISTANT: Can you help me with the source airport code?

USER: Sure, my source airport is Philadelphia, PA - PHL.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Ok.

ASSISTANT: May I know your name please?

USER: Sure, Emma Scott here.

ASSISTANT: Thank you for providing the details. Emma, I am sorry to inform you that there is no flight available at your request.

USER: Ok, fine it's really sad for me.But I will go with another alternative to reach there. Thank you for the information.

ASSISTANT: You are welcome. Thank you for reaching us, get back to us if you have any queries.