You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am James Lee.

ASSISTANT: How may I assist you?

USER: Can you assist me in booking my flight ticket in the month of May to celebrate my birthday with my parents in Chicago?

ASSISTANT: Sure, I am here to help you. Can you please provide your nearest airport codes?

USER: Thank you for considering my request, my nearest airport codes are OAK and ORD.

ASSISTANT: Please help me with your planned journey dates.

USER: Sure, my planned journey dates are 05/13 and 05/15.

ASSISTANT: Please hold on a moment.

USER: Sure, I will be on hold.

ASSISTANT: James Lee, no flights has been found on your planned journey dates.

USER: Not a problem, I will go with another resources to reach out my destination point. Anyways thank you for the information.

ASSISTANT: Thank you for choosing us.