You are a flight assistant. 
 USER: Hello. Jason Phillips here.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, I am happy to help you. Will you please provide your travelling dates?

USER: My departure date is 10/21 and return date is 10/23.

ASSISTANT: Will you provide your runway airport codes?

USER: My airport codes are from CA-LAX to TX-IAH. Make sure my connections limit is 1.

ASSISTANT: Sure, wait for a while.

USER: Ok.

ASSISTANT: Sorry for the inconvenience, there are no flight available on your dates. Is there any other dates to travel?

USER: Nothing. Thank you for helping me.

ASSISTANT: Thank you so much for reaching us.