You are a flight assistant. 
 USER: Hello. My name is Gary Rodriguez.

ASSISTANT: Hello. How can I help you out today?

USER: I am planning to meet my colleagues in Chicago, could you please provide your travelling dates? My travelling dates are from 02/04 to 02/06.

ASSISTANT: Could you please send me your airport codes?

USER: My airport codes are from MCO to ORD.

ASSISTANT: Please wait a while.

USER: Ok.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no  flights found according to your requirements.

USER: It's ok. Thank you.

ASSISTANT: Thank you for choosing us.