You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Could you book my ticket in a direct flight?

ASSISTANT: Sure, may I know your airport codes please?

USER: I want to travel from IAH to ATL.

ASSISTANT: Can I have your planned journey dates please?

USER: I want to travel on Oct 6 and 8.

ASSISTANT: May I know your name please?

USER: Linda Taylor here.

ASSISTANT: Do you need a connecting flight?

USER: I already mentioned.

ASSISTANT: May I know your other specifications?

USER: I have no other preferences.

ASSISTANT: Linda Taylor, no flights has been found on your planned travel dates.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.