You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I aid you?

USER: I am Stephen Hernandez. I need to book a flight ticket from SEA to HOU, Can you please help me for booking?

ASSISTANT: Sure, I will help you, May I know your travelling dates?

USER: I would like to travel on 03/16 to return on 03/18.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT:  Please provide me your depart time and arrival time.

USER: My departure time is afternoon.

ASSISTANT: Is there any class preference?

USER: I am comfortable with any class.

ASSISTANT: Thanks for your details, there are no flights running on your specified dates.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you.