You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: Robert Mitchell here. I would like to attend comic con event at Houston, please help me in booking a ticket from SEA to IAH.

ASSISTANT: When you are willing to travel?

USER: My planned travel dates are on Jan 02 and Jan 04.

ASSISTANT: Do you have any class preference?

USER: No, any class is comfortable for my trip.

ASSISTANT: Let me know your connection limit.

USER: I prefer single connection.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the evening.

ASSISTANT: Sorry, we found no flights on your given dates.

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

ASSISTANT: Thank you for reaching us.