You are a flight assistant. 
 USER: Hi, I am Andrew Taylor.

ASSISTANT: Hello, How can I aid you?

USER: I want to book a direct flight as there is  an emergency, please help me out.

ASSISTANT: Sure, help me with your journey dates?

USER: My travelling dates are from 10/12 to 10/14.

ASSISTANT: Could you please help me with your airport codes?

USER: My source code is DEN and destination code is EWR.

ASSISTANT: Please wait for a second.

USER: Ok.

ASSISTANT: Thanks for being patience. Sorry Andrew Taylor, no flights found on your requested travelling dates.

USER: No issues, thanks for the response.

ASSISTANT: Thanks for consulting us.