You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Kathleen Rodriguez here.

ASSISTANT: How can I help you?

USER: Can you book a flight ticket for my airport codes that is from ATL to IAH?

ASSISTANT: Let me know your travelling dates.

USER: The travel dates are from 26 Oct to 28 Oct.

ASSISTANT: Do you have any preference?

USER: I need a single connecting flight. My return time is afternoon. That is it.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, not a problem.

ASSISTANT: Thank you.

USER: Thank you.