You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, may I know your airport codes?

USER: My travelling airport codes are LAS and IAH.

ASSISTANT: Can you please share your trip dates?

USER: My travelling dates are Oct 20 and 22.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please forward your name.

USER: My name is Gary Green.

ASSISTANT: There are no flights found on your specified dates.

USER: No issues, thank you for your information.

ASSISTANT: Thank you for availing us.