You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: I am Mark Phillips. Can you help me in booking my flight ticket with a normal cost airline?

ASSISTANT: Mark Phillips, I am here to help you for this. Could you please share me your airport code?

USER: My source is DTW, my landing point is OAK.

ASSISTANT: Can you please mention your travel dates?

USER: My starting date is July 13th and I would like to return on July 15th.

ASSISTANT: Do you have any airline preference?

USER: I already mentioned in the above that I need a normal cost airline.

ASSISTANT: As per your data, there is a flight with Delta Airlines and the ticket fare is 100. Would you like me to make the reserving the ticket now?

USER: If it a normal cost airline, you can proceed.

ASSISTANT: Your ticket is reserved in economy class with the flight-1000.

USER: Thank you.

ASSISTANT: Thank you very much for contacting our agency.