You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: There is a sport event in New York and I want to attend it please book a flight for me.

ASSISTANT: Can you please tell your travelling dates?

USER: My travel dates are 11/04 and 11/06.

ASSISTANT: Can you please tell your travelling locations?

USER: My journey codes are CLT and EWR.

ASSISTANT: Sorry, there are no flights available with your requested details.

USER: Not a problem, Thank you for helping me.

ASSISTANT: Thank you and have a nice day.