You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I am Rebecca Moore. I want to book a flight ticket on dates 11/12 and 11/14, can you help me with booking please?

ASSISTANT: Sure, kindly share your airport codes.

USER: My airport codes are HOU and DEN.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: Is there any other specification?

USER: I want to return at evening.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flights found with your requirement.

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

ASSISTANT: Thanks for reaching us.