You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am planning to visit Houston, will you help me in booking the flight ticket from HOU to IAH?

ASSISTANT: Sure, I will help you. Please help me with your planned travelling dates.

USER: My preferable journey dates are Apr 26 and Apr 28.

ASSISTANT: Please help me with your name.

USER: Sure, myself Eric Rodriguez.

ASSISTANT: Do you need a break in between your journey?

USER: I need a flight with single connection.

ASSISTANT: Do you have any other preferences in your journey?

USER: I would like to return in morning time.

ASSISTANT: Please allow me a minute.

USER: Ok, I will wait.

ASSISTANT: Eric Rodriguez, I am really sorry to inform you that there are no flights available for your journey.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for understanding. Thank you for reaching us. Have a great time.