You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me in booking my flight ticket from IAH to LAS?

ASSISTANT: Sure, May I know your travelling dates?

USER: My planned travel dates are Oct 31 to Nov 02.

ASSISTANT: Do you have any connection limit?

USER: I prefer to fly in connecting flight.

ASSISTANT: Is there any airline preference?

USER: I need not fly in low cost airlines.

ASSISTANT: Let me know your departure and arrival timings.

USER: I want to return in the morning.

ASSISTANT: May I know your name?

USER: Debra Phillips.

ASSISTANT: Sorry, there are no flights found with your data.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you.