You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Helen Nelson. I want to travel from Los Angeles to Houston for a business trip. Can you please help me to book a ticket?

ASSISTANT: Can I know your airport codes?

USER: My origin airport code is CA-LAX and destination airport code is TX-IAH.

ASSISTANT: Can I know your travel dates?

USER: My departure date is 06/05 and return date is 06/07. Make sure my price limit is 500 and the connections limit is 1.

ASSISTANT: Give me a minute, I will be back with the flight details.

USER: OK.

ASSISTANT: There is a flight 1022 is available with 0 connection, shall I book the flight?

USER: But I need connections limit 1.

ASSISTANT: Sorry, there are no flights available with 1 connections.

USER: OK, thanks for your help.

ASSISTANT: Welcome. Have a nice journey. Have a nice day.