You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to travel from HOU to IAH. Can you help me to book a flight ticket?

ASSISTANT: Let me know your travelling dates.

USER: I want to travel in the flight on Oct 03 and Oct 05.

ASSISTANT: Do you have any preference?

USER: I want to travel in a connecting flight.

ASSISTANT: Can I know your name?

USER: Katherine Phillips.

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

USER: That's ok. Anyways, thank you.

ASSISTANT: Thank you.