You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Helen Wright here. I would like to attend a meeting at Seattle, please help me in booking a ticket from HOU to SEA.

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My planned travel dates are on Sept 08 and Sept 10.

ASSISTANT: Do you need any specifications?

USER: I would like to return in the afternoon.

ASSISTANT: Can I know your preferences?

USER: I need a flight with single connection.

ASSISTANT: Sorry, there are no flights found in our database.

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

ASSISTANT: Thank you for reaching us.