You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I want to meet my friend at LAX, can you please book me a flight ticket from IAH?

ASSISTANT: Sure, I will help you. Can you please share me your travelling dates?

USER: My travelling dates are from Oct 1st to Oct 3rd.

ASSISTANT: Ok, please share me your name.

USER: I am Michael Lee.

ASSISTANT: Ok, do you have any connection limit?

USER: I want a single connection in between my journey.

ASSISTANT: Ok, Is there any other specifications?

USER: Yes, I want to return in the evening. I prefer major airlines to travel.

ASSISTANT: Sorry, no flights are available on your route.

USER: No issues, thank you.

ASSISTANT: Welcome, have a nice day.