You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: Dorothy Roberts here. I would like to visit space centre which in Houston, can you book the ticket for me?

ASSISTANT: Dorothy can you tell me your journey dates?

USER: My travelling dates will be from 12/29 till 12/31.

ASSISTANT: Provide me your airport codes?

USER: My location codes are from LGA to IAH. Make sure that the connection limit should be 1.

ASSISTANT: No flights were found by your name. Can I help you with anything else? No flights were found by your requirement.

USER: That's ok. Thank you for your information.

ASSISTANT: You are welcome.