You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend rock band show. please check the flight availability on 09/19 and 09/21.

ASSISTANT: Sure, may I know your name please?

USER: Joseph Gonzalez here.

ASSISTANT: Can you please share your airport codes?

USER: My planned airport codes are HOU and LAX.

ASSISTANT: Do you have any connection limit?

USER: I want a flight with single connection.

ASSISTANT: Is there any class preference?

USER: No more specifications please, go ahead with booking.

ASSISTANT: Joseph Gonzalez, there are no flights available in your route.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.