You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Susan Harris.

ASSISTANT: How can I help you Harris?

USER: I am planning to attend convocation meeting at Dallas. Can you please help me with booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your travelling airport codes?

USER: My source airport code is OAK and the destination airport code is DFW.

ASSISTANT: On which dates you want to travel?

USER: Sure, I would like to take off on 06/02 and return back on 06/04.

ASSISTANT: Please wait a moment.

USER: Ok, but please make sure that the price limit does not exceed 500.

ASSISTANT: Sorry Harris, no flights found on your requested dates.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.