You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Michael Hill.

ASSISTANT: How can I  help you?

USER: Please help me in booking flight ticket on dates 01/26 and 01/28.

ASSISTANT: Your travelling airport codes please?

USER:                                     My airport codes are ATL and EWR.

ASSISTANT: I am sorry no flights found on your route.

USER:             That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.