You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Thomas Adams here. I would like to visit Space Center in Houston. Can you please help me for booking the flight ticket?

ASSISTANT: Sure Adams, can I know the travel dates please?

USER: My departure date is 07/02 and return date is 07/04.

ASSISTANT: May I know your airport codes please?

USER: My airport codes are from CA-LAX to TX-IAH.

ASSISTANT: Ok, wait a moment please.

USER: Ok, make sure my connections limit is 1.

ASSISTANT: Sorry Adams, there are no flights with connection 1.

USER: So sad. Anyway, thank you for the information.

ASSISTANT: You are welcome. Thank you for approaching us.